Tape, tape device, tape driving device and related device

Abstract

The embodiment of the invention provides a magnetic tape, a magnetic tape device, a magnetic tape driving device and related equipment, and relates to the technical field of magnetic tapes. The magnetic tape comprises a base material layer, a front magnetic layer and a back magnetic layer, the front magnetic layer and the back magnetic layer are located on the two sides of the base material layer in the thickness direction respectively, and the front magnetic layer and the back magnetic layer are both used for recording data. In this way, the magnetic tape with the short length can have the large storage capacity.

Description

Technical Field

[0001] This application relates to the field of magnetic tape technology, and in particular to a magnetic tape, a magnetic tape device, a magnetic tape drive device, and related equipment. Background Technology

[0002] Magnetic tape is a storage medium with advantages such as low cost, high reliability, and high storage density. Data can be written to or read from magnetic tape using a magnetic tape drive.

[0003] In related technologies, magnetic tapes with large storage capacity often require a long length. Therefore, how to make short magnetic tapes have a large storage capacity has become an urgent problem to be solved in the field of magnetic tape technology. Summary of the Invention

[0004] This application provides a magnetic tape, a magnetic tape device, a magnetic tape drive, a magnetic tape storage device, and a data processing device, which can enable a short magnetic tape to have a large storage capacity.

[0005] A first aspect of this application provides a magnetic tape, which includes a substrate layer, a front magnetic layer, and a back magnetic layer. The front magnetic layer and the back magnetic layer are located on opposite sides of the substrate layer in the thickness direction, and both the front magnetic layer and the back magnetic layer are used for recording data.

[0006] The magnetic tape provided in this application embodiment can have both its front and back magnetic layers used for recording data, enabling a shorter tape to have a larger storage capacity. The shorter tape length also improves the tape's addressing speed. Furthermore, the front and back magnetic layers are located on opposite sides of the substrate layer's thickness, allowing for simultaneous reading and writing, which further enhances the tape's addressing speed and read / write rate. Additionally, the data recorded on the front and back magnetic layers provides redundancy protection; if some data recorded on the front magnetic layer is damaged or lost, the redundant data recorded on the back magnetic layer can fill the gap, giving the tape better robustness.

[0007] In one possible implementation, the front magnetic layer includes a front data track, the back magnetic layer includes a back data track, both the front and back data tracks are used for recording data, and the length of the front data track is equal to the length of the back data track.

[0008] This facilitates synchronous addressing and synchronous reading / writing along the length of the magnetic tape on both the front and back magnetic layers. Furthermore, it allows for a larger space occupied by the front data tracks on both the front and back magnetic layers along the tape's length, resulting in more space available for data recording on both layers and thus a larger tape capacity.

[0009] In one possible implementation, the number of front data tracks in the front magnetic layer is equal to the number of back data tracks in the back magnetic layer.

[0010] This facilitates synchronous track switching between the front and back magnetic layers, enabling simultaneous reading and writing. Furthermore, it allows for a larger space occupied by the front data tracks on both the front and back magnetic layers across the width of the magnetic tape, resulting in greater space available for data recording and thus a larger tape capacity.

[0011] In one possible implementation, the width of the front data track of the front magnetic layer is equal to the width of the back data track of the back magnetic layer.

[0012] This allows for the arrangement of the same number of front and back data tracks, facilitating synchronous track switching and reading / writing on both the front and back magnetic layers. Furthermore, it allows for a larger space occupied by the front data tracks on both the front and back magnetic layers across the width of the magnetic tape, resulting in greater space available for data recording and thus a larger magnetic tape capacity.

[0013] In one possible implementation, the front magnetic layer includes a front data band comprising multiple front data tracks. The back magnetic layer includes a back data band comprising multiple back data tracks. The number of front data tracks in the front data band is equal to the number of back data tracks in the back data band.

[0014] This facilitates synchronous track switching within a single front and back data tape, enabling simultaneous read and write operations. Furthermore, the front and back data tapes minimize wasted space across the tape's width, allowing for larger capacities on both sides.

[0015] In one possible implementation, the front data tracks of the front magnetic layer and the back data tracks of the back magnetic layer are arranged symmetrically with respect to the substrate layer.

[0016] This facilitates synchronous addressing and reading / writing of the front and back magnetic layers. Furthermore, it minimizes wasted space on the front and back magnetic layers, thus increasing the magnetic tape's capacity.

[0017] In one possible implementation, the front magnetic layer includes a front servo strip, and the back magnetic layer includes a back servo strip.

[0018] This allows for independent positioning of the two magnetic heads on the front and back magnetic layers, as well as for writing or reading data. Furthermore, the accuracy and reliability of writing or reading data on both the front and back magnetic layers are high.

[0019] In one possible implementation, the front servo strip and the back servo strip are arranged symmetrically with respect to the substrate layer.

[0020] This facilitates synchronous addressing and synchronous reading / writing of the front and back magnetic layers.

[0021] In one possible implementation, the width of the front data track of the front magnetic layer is less than or equal to 400 nm.

[0022] Thus, the narrower width of the front data track allows for an increase in the number of front data tracks on the front magnetic layer, which in turn increases the capacity of the front magnetic layer per unit length. This helps to shorten the length of the magnetic tape, thereby reducing the maximum seek time of the front magnetic layer along the length of the magnetic tape.

[0023] In one possible implementation, the width of the reverse data track of the reverse magnetic layer is less than or equal to 400 nm.

[0024] Thus, the width of the reverse data track is smaller, which is beneficial to increasing the number of reverse data tracks in the reverse magnetic layer, thereby increasing the capacity of the reverse magnetic layer per unit length, which is beneficial to shorten the length of the magnetic tape, and thus shorten the maximum seek time of the reverse magnetic layer along the length direction of the magnetic tape.

[0025] In one possible implementation, the front data band of the front magnetic layer includes a front data tracks, where a is an integer greater than or equal to 7000.

[0026] Thus, the front data tape includes a large number of front data tracks, and the front data tape has a large capacity per unit length, which is beneficial for shortening the length of the magnetic tape, and thus can shorten the maximum seek time of the front data tape along the fourth direction.

[0027] In one possible implementation, the reverse data band of the reverse magnetic layer includes b reverse data tracks, where b is an integer greater than or equal to 7000.

[0028] Thus, the reverse data tape includes a larger number of reverse data tracks, and the reverse data tape has a larger capacity per unit length, which is beneficial for shortening the length of the magnetic tape, thereby shortening the maximum seek time of the reverse data tape along the fourth direction.

[0029] In one possible implementation, the front magnetic layer includes c front data bands, where c is an integer greater than 4.

[0030] Thus, the front magnetic layer includes a large number of front data bands, which is conducive to the arrangement of a large number of front data tracks. The front magnetic layer has a large capacity per unit length, which is conducive to shortening the length of the magnetic tape, thereby shortening the maximum seek time of the front magnetic layer along the fourth direction.

[0031] In one possible implementation, the reverse magnetic layer includes d reverse data bands, where d is an integer greater than 4.

[0032] Thus, the reverse magnetic layer includes a large number of reverse data tapes, which is conducive to arranging a large number of reverse data tracks. The reverse magnetic layer has a large capacity per unit length, which is conducive to shortening the length of the magnetic tape, thereby shortening the maximum seek time of the reverse magnetic layer along the fourth direction.

[0033] A second aspect of this application provides a magnetic tape device, which includes a reel and a magnetic tape as described in any of the above embodiments, the magnetic tape being wound on the reel.

[0034] A third aspect of this application provides a magnetic tape driving device, which includes a first magnetic head, a second magnetic head, and a first magnetic tape support mechanism. The first magnetic tape support mechanism supports a first magnetic tape, wherein the first magnetic tape includes a first substrate layer, a first front magnetic layer, and a first back magnetic layer. The first front magnetic layer and the first back magnetic layer are respectively located on opposite sides of the thickness direction of the first substrate layer, and both the first front magnetic layer and the first back magnetic layer are used for recording data. The first magnetic head and the second magnetic head are respectively located on opposite sides of the thickness direction of the first magnetic tape supported by the first magnetic tape support mechanism. The first magnetic head is used to read or write data onto the first front magnetic layer, and the second magnetic head is used to read or write data onto the first back magnetic layer.

[0035] In this way, the first and second magnetic heads can read or write data to the first front magnetic layer and the first back magnetic layer, respectively. This facilitates the recording of data on both sides of the first magnetic tape, and the reading of data recorded on both sides. This is beneficial for reading and writing to short magnetic tapes with large storage capacity, thereby improving addressing speed. Furthermore, it allows for simultaneous reading or writing of data to both the first front and the first back magnetic layers, improving the addressing speed and read / write rate of the tape drive.

[0036] The first magnetic tape can be any of the magnetic tapes described in the above embodiments.

[0037] In one possible implementation, the first read / write head includes a first front-side servo reader, and the second read / write head includes a first back-side servo reader.

[0038] This allows the first and second magnetic heads to be independently positioned and to write or read data on the first front magnetic layer and the first back magnetic layer, respectively. In addition, the accuracy and reliability of the first and second magnetic heads in writing or reading data are both high.

[0039] In one possible implementation, the first magnetic head includes a first front-side data reader and a first front-side data writer, and the second magnetic head includes a first back-side data reader and a first back-side data writer. The number of first front-side data readers in the first magnetic head is the same as the number of first back-side data readers in the second magnetic head, and the number of first front-side data writers in the first magnetic head is the same as the number of first back-side data writers in the second magnetic head.

[0040] Thus, the data processing of the magnetic tape drive device has a high degree of normalization, which facilitates the synchronous reading and writing of the first and second magnetic heads.

[0041] In one possible implementation, the dimensions of the first front data reader of the first magnetic head in the first direction are the same as the dimensions of the first back data reader of the second magnetic head in the first direction. The dimensions of the first front data writer of the first magnetic head in the first direction are the same as the dimensions of the first back data writer of the second magnetic head in the first direction. Here, the first direction refers to the width direction of the first magnetic tape supported by the first magnetic tape support mechanism.

[0042] Thus, the data processing of the magnetic tape drive device has a high degree of normalization, which facilitates the synchronous reading and writing of the first and second magnetic heads.

[0043] In one possible implementation, the size of the first front data writer of the first magnetic head in the first direction is less than or equal to 1.1 μm, and the size of the first front data reader of the first magnetic head in the first direction is less than or equal to 220 nm.

[0044] This facilitates the formation of narrow front data tracks in the first front magnetic layer, enabling the reading and writing of narrow front data magnetic tapes. It also increases the number of front data tracks in the first front magnetic layer, thereby increasing the capacity of the first front magnetic layer per unit length. Furthermore, it helps to shorten the length of the first magnetic tape, which in turn shortens the maximum seek time of the first front magnetic layer along the extension direction of the first magnetic tape.

[0045] In one possible implementation, the size of the first reverse data writer of the second magnetic head in the first direction is less than or equal to 1.1 μm, and the size of the first reverse data reader of the second magnetic head in the first direction is less than or equal to 220 nm.

[0046] This facilitates the formation of narrower feedback data tracks in the first reverse magnetic layer, enabling the reading and writing of these tracks. It also increases the number of reverse data tracks in the first reverse magnetic layer, thereby increasing the capacity of the first reverse magnetic layer per unit length. Furthermore, it helps to shorten the length of the first magnetic tape, which in turn shortens the maximum seek time of the first reverse magnetic layer along the extension direction of the first magnetic tape.

[0047] In one possible implementation, the first magnetic tape support mechanism includes a first front support member, a second front support member, a first back support member, and a second back support member. The first front support member, the second front support member, and the first magnetic head are located on the side of the first magnetic tape supported by the first magnetic tape support mechanism that faces the front. The first and second front support members support the front side of the first magnetic tape, and the first magnetic head is located between the first and second front support members. Similarly, the first back support member, the second back support member, and the second magnetic head are located on the side of the first magnetic tape supported by the first magnetic tape support mechanism that faces the back. The first and second back support members support the back side of the first magnetic tape, and the second magnetic head is located between the first and second back support members.

[0048] Thus, both the first and second front supports support the front side of the first magnetic tape, facilitating the movement of the first magnetic head relative to the first magnetic tape. This results in higher accuracy and reliability for the positioning, addressing, and data reading or writing of the first magnetic head. Similarly, both the first and second back supports support the back side of the first magnetic tape, facilitating the movement of the second magnetic head relative to the first magnetic tape. This also results in higher accuracy and reliability for the positioning, addressing, and data reading or writing of the second magnetic head.

[0049] In one possible implementation, the magnetic tape drive further includes a housing. A first magnetic head, a second magnetic head, and a first magnetic tape support mechanism are all disposed within the housing. The housing has a first region and a second region. The first region accommodates a first reel, and the second region accommodates a second reel, with the first magnetic tape wound around the first and second reels; the first and second regions are arranged in a straight line along a second direction. The housing includes a first sidewall located on one side of the housing in a third direction, with the first magnetic head located between the first region and the first sidewall, and the second magnetic head located between the second region and the first sidewall. Both the second and third directions are perpendicular to the width direction of the first magnetic tape supported by the first magnetic tape support mechanism, with the second direction perpendicular to the third direction.

[0050] Thus, the first magnetic head and the second magnetic head are located on the same side of the whole formed by the first tape and the second tape. The length of the first magnetic tape between the first magnetic head and the second magnetic head is relatively short. The asynchronous distance between the first magnetic head and the second magnetic head when reading on the first magnetic tape is small due to assembly tolerance, first magnetic tape creep, etc. This can reduce the requirement for the capacity of the buffer area set up to synchronize the data read by the first magnetic head and the second magnetic head with the data written by the first magnetic head and the second magnetic head.

[0051] In one possible implementation, the magnetic tape drive device further includes a housing. A first magnetic head, a second magnetic head, and a first magnetic tape support mechanism are all disposed within the housing. The housing has a first region and a second region. The first region accommodates a first reel, and the second region accommodates a second reel, with the first magnetic tape wound around the first and second reels. The first and second regions are staggered in both a second direction and a third direction. The housing includes a first sidewall and a second sidewall, located on opposite sides of the housing in the third direction. The distance between the first region and the first sidewall is greater than the distance between the second region and the first sidewall, and the distance between the first region and the second sidewall is less than the distance between the second region and the second sidewall. The first magnetic head is located between the first region and the first sidewall, and the second magnetic head is located between the second region and the second sidewall.

[0052] In this way, the center of gravity of the magnetic tape drive device after loading the first and second tape reels can be located in the middle of the outer casing, and the rotation of the first and second tape reels is less likely to cause problems such as imbalance in the magnetic tape drive device.

[0053] In one possible implementation, the magnetic tape drive device further includes a head drive assembly, with the first and second heads connected to the same head drive assembly.

[0054] In this way, fewer head drive components are needed, and the head drive components occupy less space, which can simplify the internal structure of the housing and facilitate the arrangement of other components.

[0055] In one possible implementation, the magnetic tape drive device further includes a first head drive assembly and a second head drive assembly, wherein the first head is connected to the first head drive assembly and the second head is connected to the second head drive assembly.

[0056] In this way, the first and second magnetic heads are driven independently, which facilitates the accurate positioning of the first and second magnetic heads on the first magnetic tape, so as to achieve synchronous addressing and synchronous reading and writing of the first and second magnetic heads.

[0057] In one possible implementation, the magnetic tape drive further includes a third magnetic head, a fourth magnetic head, and a second magnetic tape support mechanism. The second magnetic tape support mechanism supports a second magnetic tape, which includes a second substrate layer, a second front magnetic layer, and a second back magnetic layer. The second front magnetic layer and the second back magnetic layer are located on opposite sides of the thickness direction of the second substrate layer, and both are used for recording data. The third and fourth magnetic heads are located on opposite sides of the thickness direction of the second magnetic tape supported by the second magnetic tape support mechanism. The third magnetic head is positioned towards the second front magnetic layer and is used to read or write data to it, while the fourth magnetic head is positioned towards the second back magnetic layer and is used to read or write data to it.

[0058] In this way, the tape drive can read and write to multiple tapes, allowing for shorter lengths of each tape and thus improving addressing speed. Furthermore, it facilitates recording data on both sides of the first and second tapes, as well as reading data recorded on both sides. Additionally, it allows for simultaneous reading or writing of data to both the first and second tapes, further enhancing the addressing speed and read / write rate of the tape drive.

[0059] The second magnetic tape can be any of the magnetic tapes described in the above embodiments.

[0060] In one possible implementation, the magnetic tape drive device further includes a head drive assembly. The first head, second head, third head, and fourth head are connected to the same head drive assembly.

[0061] In this way, fewer head drive components are needed, and the head drive components occupy less space, which can simplify the internal structure of the housing and facilitate the arrangement of other components.

[0062] In one possible implementation, the magnetic tape drive device further includes a first head drive assembly and a third head drive assembly, wherein the first and second heads are connected to the first head drive assembly, and the third and fourth heads are connected to the third head drive assembly.

[0063] Thus, the first and second magnetic heads are driven by the first head drive assembly, and the third and fourth magnetic heads are driven by the third head drive assembly. This facilitates accurate positioning of the first and second magnetic heads on the first magnetic tape, as well as accurate positioning of the third and fourth magnetic heads on the second magnetic tape, enabling synchronous addressing and reading / writing of both the first and second magnetic tapes. Furthermore, the required number of head drive assemblies is smaller, and these assemblies occupy less space, allowing for a simpler internal structure and easier arrangement of other components.

[0064] In one possible implementation, the magnetic tape drive device further includes a first head drive assembly, a second head drive assembly, a third head drive assembly, and a fourth head drive assembly, wherein the first head is connected to the first head drive assembly, the second head is connected to the second head drive assembly, the third head is connected to the third head drive assembly, and the fourth head is connected to the fourth head drive assembly.

[0065] In this way, the first, second, third, and fourth magnetic heads can be driven independently, which facilitates the accurate positioning of the first, second, third, and fourth magnetic heads, and enables synchronous addressing and synchronous reading and writing of the first, second, third, and fourth magnetic heads.

[0066] A fourth aspect of this application provides a magnetic tape storage device, which includes a first magnetic tape and a magnetic tape drive device as described in any of the above embodiments. A first magnetic tape support mechanism of the magnetic tape drive device supports the first magnetic tape. A first magnetic head and a second magnetic head of the magnetic tape drive device are respectively located on opposite sides of the thickness direction of the first magnetic tape. The first magnetic head faces the first front magnetic layer of the first magnetic tape and is used to read or write data to the first front magnetic layer. The second magnetic head faces the first back magnetic layer of the first magnetic tape and is used to read or write data to the first back magnetic layer.

[0067] In this way, the first and second magnetic heads can read or write data to the first front magnetic layer and the first back magnetic layer respectively. This facilitates the recording and reading of data on both sides of the first magnetic tape, allowing for increased tape capacity while maintaining the same tape length, and decreased tape length while maintaining the same tape capacity. This results in a shorter tape with a larger storage capacity, enabling a reduction in the size of the tape drive and tape storage device while maintaining the same storage capacity, and improving addressing speed. Furthermore, it facilitates simultaneous reading or writing of data to both the first front and first back magnetic layers, improving the addressing speed and read / write rate of the tape drive. Additionally, the data recorded on the first front and first back magnetic layers provides redundancy protection; if some data recorded on the first front magnetic layer is damaged or lost, it can be filled by the redundant data recorded on the first back magnetic layer, giving the first magnetic tape good robustness.

[0068] In one possible implementation, the magnetic tape storage device further includes a second magnetic tape, a second magnetic tape support mechanism of the magnetic tape drive device supports the second magnetic tape, and a third magnetic head and a fourth magnetic head of the magnetic tape drive device are respectively located on both sides of the thickness direction of the second magnetic tape. The third magnetic head faces the second front magnetic layer of the second magnetic tape and is used to read or write data on the second front magnetic layer, and the fourth magnetic head faces the second back magnetic layer of the second magnetic tape and is used to read or write data on the second back magnetic layer.

[0069] In this way, magnetic tape storage devices can store data using multiple magnetic tapes. While maintaining the same storage capacity, the length of each tape can be shortened to further improve addressing speed. Furthermore, it facilitates recording data on both sides of the first and second tapes, as well as reading data recorded on both sides. Additionally, it facilitates simultaneous reading and writing of data to both tapes, improving the addressing speed and read / write rate of the tape drive. This allows for increased addressing and read / write speeds without changing the storage capacity. Moreover, the data recorded on the first and second tapes can form redundancy protection; if some data on the first tape is damaged or lost, the redundant data on the second tape can fill the gap, giving the magnetic tape storage device good robustness.

[0070] A fifth aspect of this application provides a data processing apparatus, which includes a data processing unit and a magnetic tape storage device as described in any of the above embodiments. Both the first magnetic head and the second magnetic head of the magnetic tape storage device are electrically connected to the data processing unit. This reduces the space occupied by the magnetic tape storage device while maintaining the same storage capacity, and improves the tape addressing speed and tape read / write rate of the data processing apparatus. Furthermore, it also enhances the robustness of data storage in the data processing apparatus. Attached Figure Description

[0071] Figure 1 A schematic diagram of a data processing device provided in an embodiment of this application;

[0072] Figure 2 A schematic diagram of a magnetic tape storage device provided in an embodiment of this application;

[0073] Figure 3 A cross-sectional schematic diagram of a magnetic tape provided in an embodiment of this application;

[0074] Figure 4 A schematic diagram of the front magnetic layer of a magnetic tape provided in an embodiment of this application;

[0075] Figure 5 A schematic diagram of the reverse magnetic layer of a magnetic tape provided in an embodiment of this application;

[0076] Figure 6 A schematic diagram of a magnetic head provided for an embodiment of this application;

[0077] Figure 7 A schematic diagram of another magnetic tape storage device provided in an embodiment of this application;

[0078] Figure 8 A schematic diagram of yet another magnetic tape storage device provided in the embodiments of this application;

[0079] Figure 9 A schematic diagram of yet another magnetic tape storage device provided in the embodiments of this application;

[0080] Figure 10 A schematic diagram of yet another magnetic tape storage device provided in the embodiments of this application;

[0081] Figure 11 This is a schematic diagram of another magnetic tape storage device provided in an embodiment of this application.

[0082] Explanation of reference numerals in the attached figures:

[0083] 1. Data processing equipment;

[0084] 10. Magnetic tape storage device; 20. Data processing device;

[0085] 100, magnetic tape; 100a, first magnetic tape; 100b, second magnetic tape;

[0086] 110. Substrate layer; 120. Front magnetic layer; 121. Front data strip; 1211. Front data track; 122. Front servo strip; 130. Back magnetic layer; 131. Back data strip; 1311. Back data track; 132. Back servo strip;

[0087] 200, magnetic tape support mechanism; 200a, first magnetic tape support mechanism; 200b, second magnetic tape support mechanism;

[0088] 210. First front support member; 220. Second front support member; 230. First back support member; 240. Second back support member; 250. First guide member; 260. Second guide member; 270. Third guide member; 280. Fourth guide member;

[0089] 300, Magnetic head; 300a, First magnetic head; 300b, Second magnetic head; 300c, Third magnetic head; 300d, Fourth magnetic head;

[0090] 310. Servo reader; 320. Data reader; 330. Data writer;

[0091] 400, reel; 400a, first reel; 400b, second reel; 400c, third reel; 400d, fourth reel;

[0092] 500, magnetic tape drive unit; 500a, first magnetic tape drive unit; 500b, second magnetic tape drive unit;

[0093] 510. First magnetic tape drive mechanism; 520. Second magnetic tape drive mechanism;

[0094] 600, Head drive assembly; 600a, First head drive assembly; 600b, Second head drive assembly; 600c, Third head drive assembly; 600d, Fourth head drive assembly;

[0095] 610. Stepper motor; 620. Lead screw mechanism; 630. Voice coil motor;

[0096] 700, Connecting piece; 700a, First connecting piece; 700b, Second connecting piece; 700c, Third connecting piece; 700d, Fourth connecting piece;

[0097] 800, Outer shell; 810, First sidewall; 820, Second sidewall; 830, First region; 840, Second region; 850, Communication interface; 860, Partition;

[0098] a) First direction; b) Second direction; c) Third direction; d) Fourth direction. Detailed Implementation

[0099] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0100] Magnetic tape is a storage medium that can be used to record data and has advantages such as low cost, high reliability, and high storage density.

[0101] Figure 1 This is a schematic diagram of a data processing device provided in an embodiment of this application.

[0102] like Figure 1 As shown, this application embodiment provides a data processing device 1, which includes a data processing unit 20 and a magnetic tape storage device 10. The data processing unit 20 and the magnetic tape storage device 10 are electrically connected. The data processing unit 20 can store data in the magnetic tape storage device 10, and the data processing unit 20 can also read the data stored in the magnetic tape storage device 10.

[0103] For example, data processing device 1 may include, but is not limited to, a computer, a server, etc.

[0104] For example, the magnetic tape storage device 10 may include, but is not limited to, a magnetic tape drive, a magnetic tape library, etc.

[0105] Figure 2 This is a schematic diagram of a magnetic tape storage device provided in an embodiment of this application. In the diagram, direction b is a second direction, direction c is a third direction, and both the second and third directions are perpendicular to the first direction. The second direction is perpendicular to the third direction, and the first direction is the width direction of the magnetic tape 100. The first direction can also be the thickness direction of the magnetic tape storage device 10.

[0106] like Figure 2 As shown, the magnetic tape storage device 10 includes a magnetic tape drive and at least one magnetic tape 100. The magnetic tape 100 is wound on two reels 400 and loaded into the magnetic tape drive via the reels 400. The magnetic tape drive includes a magnetic head 300, which is electrically connected to the data processing device 20. The magnetic head 300 can read or write data onto the magnetic tape 100.

[0107] In some examples, the magnetic tape storage device 10 can be a magnetic tape and head integrated device, in which case the magnetic tape drive includes at least two reels 400, with the magnetic tape 100 wound on the two reels 400 of the magnetic tape drive.

[0108] In other examples, the magnetic tape storage device 10 can be a device in which the magnetic tape 100 and the magnetic head 300 are separable. In this case, the magnetic tape storage device 10 includes a magnetic tape assembly, which includes a housing, a magnetic tape 100, and a reel 400 disposed within the housing. At least one of the two reels 400 wound around the magnetic tape 100 is the reel 400 of the magnetic tape assembly. The magnetic tape assembly can be loaded into a magnetic tape drive. After the magnetic tape assembly is loaded into the magnetic tape drive, the magnetic head 300 can read or write data onto the magnetic tape 100. The magnetic tape assembly loaded into the magnetic tape drive can be removed from the magnetic tape drive. After the magnetic tape assembly is removed from the magnetic tape drive, the magnetic tape 100 is wound onto the reel 400 of the magnetic tape assembly. The magnetic tape assembly removed from the magnetic tape drive can be stored separately.

[0109] For example, the magnetic tape device can be a magnetic tape cassette.

[0110] The magnetic tape 100 includes a substrate layer 110 and a magnetic layer. The magnetic layer is stacked on the substrate layer 110. The magnetic layer is used to record data. The substrate layer 110 is used to support the magnetic layer. The magnetic head 300 can read or write data to the magnetic layer.

[0111] In related technologies, magnetic tapes often include a magnetic layer for recording data. To maximize storage capacity, magnetic tapes are typically long. However, longer tapes occupy more space after winding, and their addressing speed is often slower. Furthermore, when a magnetic tape includes only one magnetic layer for recording data, the read / write head can only read and write to that single layer. This limitation on addressing speed restricts the improvement of read / write rates. Addressing speed refers to the time required to locate a specific storage location.

[0112] Figure 3 This is a cross-sectional schematic diagram of a magnetic tape provided in an embodiment of this application.

[0113] like Figure 3 As shown, based on this, in this embodiment of the application, the magnetic tape 100 includes a substrate layer 110, a front magnetic layer 120, and a back magnetic layer 130. The front magnetic layer 120, the substrate layer 110, and the back magnetic layer 130 are stacked along the thickness direction of the magnetic tape 100. The front magnetic layer 120 and the back magnetic layer 130 are respectively located on both sides of the thickness direction of the substrate layer 110. The substrate layer 110 is used to support the front magnetic layer 120 and the back magnetic layer 130. Both the front magnetic layer 120 and the back magnetic layer 130 are used to record data.

[0114] In this way, compared to the design where the magnetic tape 100 includes only one magnetic layer, both the front magnetic layer 120 and the back magnetic layer 130 can be used to record data. While maintaining the same storage capacity, the length of the magnetic tape 100 can be shortened, and while maintaining the same length, the storage capacity can be increased. This allows a shorter magnetic tape 100 to have a larger storage capacity. The shortened length of the magnetic tape 100 also improves its addressing speed. Furthermore, since the front magnetic layer 120 and the back magnetic layer 130 are located on opposite sides of the substrate layer 110 in the thickness direction, they can be read or written simultaneously, further improving the addressing speed and read / write rate of the magnetic tape 100. In addition, the data recorded on the front magnetic layer 120 and the data recorded on the back magnetic layer 130 can form a redundancy protection. If some of the data recorded on the front magnetic layer 120 is damaged or lost, it can be filled by the redundant data recorded on the back magnetic layer 130, which can make the magnetic tape 100 have better robustness.

[0115] The thickness direction of the substrate layer 110 is the same as that of the magnetic tape 100.

[0116] For example, the front magnetic layer 120 may be located on the front side of the magnetic tape 100, and the back magnetic layer 130 may be located on the back side of the magnetic tape 100.

[0117] The front and back sides of the magnetic tape 100 are respectively the two sides of the magnetic tape 100 in the thickness direction. The front and back sides of the magnetic tape 100 do not specifically refer to one side of the magnetic tape 100 in the thickness direction. The front side of the magnetic tape 100 can be any side of the magnetic tape 100 in the thickness direction, and the back side of the magnetic tape 100 is the other side of the magnetic tape 100 opposite to the front side.

[0118] Figure 4 This is a schematic diagram of the front magnetic layer of a magnetic tape provided in an embodiment of this application. In the diagram, direction a is the first direction, direction d is the fourth direction, and the fourth direction is the length direction of the magnetic tape 100, which refers to the extension direction of the magnetic tape 100. Figure 4 Only one frontal data track 1211 is shown as an example.

[0119] like Figure 4 As shown, the front magnetic layer 120 includes a front data band 121, which includes multiple front data tracks 1211 for recording data. The front data band 121 refers to the data band located in the front magnetic layer 120, and the front data tracks 1211 refer to the data tracks located in the front magnetic layer 120.

[0120] For example, the front data tape 121 extends along the fourth direction, that is, the length direction of the front data tape 121 is the same as the length direction of the magnetic tape 100.

[0121] For example, the front magnetic layer 120 includes a plurality of front data bands 121 arranged side by side along a first direction.

[0122] For example, the front data track 1211 extends along the fourth direction, that is, the length direction of the front data track 1211 is the same as the length direction of the magnetic tape 100.

[0123] For example, all the front data tracks 1211 of the front magnetic layer 120 are arranged side by side along a first direction.

[0124] In some possible implementations, the front magnetic layer 120 includes a front servo band 122, which is used for positioning the magnetic head 300 that reads or writes data to the front magnetic layer 120. The front servo band 122 refers to the servo band located on the front magnetic layer 120.

[0125] This facilitates independent data writing or reading on the front magnetic layer 120. Furthermore, the accuracy and reliability of the magnetic head 300 in writing or reading data on the front magnetic layer 120 are high.

[0126] For example, the front servo tape 122 extends in the fourth direction, that is, the length direction of the front servo tape 122 is the same as the length direction of the magnetic tape 100.

[0127] For example, each front data band 121 has front servo bands 122 on both sides in the first direction to enable more accurate positioning of the magnetic head 300.

[0128] For example, the front magnetic layer 120 includes a plurality of front servo strips 122 arranged side by side along a first direction, and a front data strip 121 is formed between two adjacent front servo strips 122.

[0129] Figure 5 This is a schematic diagram of the reverse magnetic layer of a magnetic tape provided in an embodiment of this application. Figure 5 Only one reverse data track 1311 is shown as an example.

[0130] like Figure 5 As shown, the reverse magnetic layer 130 includes a reverse data band 131, which includes multiple reverse data tracks 1311 for recording data. The reverse data band 131 refers to the data band located in the reverse magnetic layer 130, and the reverse data tracks 1311 refer to the data tracks located in the reverse magnetic layer 130.

[0131] For example, the reverse data tape 131 extends along the fourth direction, that is, the length direction of the reverse data tape 131 is the same as the length direction of the magnetic tape 100.

[0132] For example, the reverse magnetic layer 130 includes a plurality of reverse data bands 131 arranged side by side along a first direction.

[0133] For example, the reverse data track 1311 extends along the fourth direction, that is, the length direction of the reverse data track 1311 is the same as the length direction of the magnetic tape 100.

[0134] For example, all the reverse data tracks 1311 of the reverse magnetic layer 130 are arranged side by side along the first direction.

[0135] In some possible implementations, the reverse magnetic layer 130 includes a reverse servo band 132, which is used for positioning the magnetic head 300 that reads or writes data to the reverse magnetic layer 130. The reverse servo band 132 refers to the servo band located on the reverse magnetic layer 130.

[0136] This facilitates independent data writing or reading from the reverse magnetic layer 130. Furthermore, the accuracy and reliability of the magnetic head 300 in writing or reading data from the reverse magnetic layer 130 are high.

[0137] The front servo band 122 located on the front magnetic layer 120 and the back servo band 132 located on the back magnetic layer 130 facilitate the independent positioning of the two magnetic heads 300 on the front magnetic layer 120 and the back magnetic layer 130, as well as the writing or reading of data.

[0138] For example, the reverse servo tape 132 extends along the fourth direction, that is, the length direction of the reverse servo tape 132 is the same as the length direction of the magnetic tape 100.

[0139] For example, each reverse data band 131 has a reverse servo band 132 on both sides in the first direction to make the positioning of the magnetic head 300 more accurate.

[0140] For example, the reverse magnetic layer 130 includes a plurality of reverse servo strips 132 arranged side by side along a first direction, and a reverse data strip 131 is formed between two adjacent reverse servo strips 132.

[0141] In some possible implementations, the front servo band 122 and the back servo band 132 are arranged symmetrically with respect to the substrate layer 110.

[0142] This facilitates synchronous addressing and synchronous reading / writing of the front magnetic layer 120 and the back magnetic layer 130.

[0143] In some possible implementations, the length of the front data track 1211 is equal to the length of the back data track 1311.

[0144] This facilitates synchronous addressing and synchronous reading / writing along the fourth direction on the front magnetic layer 120 and the back magnetic layer 130. Furthermore, compared to schemes where the lengths of the front data track 1211 and the back data track 1311 are different, the space occupied by the front data track 1211 in the fourth direction and the space occupied by the back data track 1311 in the fourth direction of the back magnetic layer 130 are both larger. This results in larger spaces for data recording in both the front and back magnetic layers 120 and 130, thereby increasing the capacity of the magnetic tape 100.

[0145] In some other possible implementations, the length of the front data track 1211 is different from the length of the back data track 1311.

[0146] In some possible implementations, the number of front data tracks 1211 of the front magnetic layer 120 is equal to the number of back data tracks 1311 of the back magnetic layer 130.

[0147] This facilitates synchronous track switching between the front magnetic layer 120 and the back magnetic layer 130, enabling synchronous reading and writing. Furthermore, compared to schemes where the number of front data tracks 1211 differs from the number of back data tracks 1311, both the space occupied by the front data tracks 1211 in the first direction and the space occupied by the back data tracks 1311 in the first direction of the back magnetic layer 130 are larger. This results in larger space for data recording in both the front and back magnetic layers 120 and 130, thus increasing the capacity of the magnetic tape 100.

[0148] In some other possible implementations, the number of front data tracks 1211 is different from the number of back data tracks 1311.

[0149] In some possible implementations, the width of the front data track 1211 of the front magnetic layer 120 is equal to the width of the back data track 1311 of the back magnetic layer 130.

[0150] This allows for the arrangement of the same number of front data tracks 1211 and back data tracks 1311, facilitating synchronous track switching and synchronous reading / writing on the front magnetic layer 120 and the back magnetic layer 130. Furthermore, compared to schemes where the widths of the front data tracks 1211 and the back data tracks 1311 are different, both the space occupied by the front data tracks 1211 in the first direction and the space occupied by the back data tracks 1311 in the first direction of the back magnetic layer 130 can be larger. This results in larger spaces for data recording in both the front and back magnetic layers 120 and 130, allowing for a larger capacity of the magnetic tape 100.

[0151] In some other possible implementations, the width of the front data track 1211 is different from the width of the back data track 1311.

[0152] In some possible implementations, the width of the front data track 1211 of the front magnetic layer 120 is less than or equal to 400 nm.

[0153] In this way, the width of the front data track 1211 is smaller, which is conducive to increasing the number of front data tracks 1211 of the front magnetic layer 120, thereby increasing the capacity of the front magnetic layer 120 per unit length, which is conducive to shortening the length of the magnetic tape 100, and thus shortening the maximum seek time of the front magnetic layer 120 along the fourth direction.

[0154] Seek time refers to the time it takes for the magnetic head 300 to move from a certain position on the magnetic tape 100 to a target position, while the maximum seek time refers to the time it takes for the magnetic head 300 to move from a certain position on the magnetic tape 100 to the farthest position on the magnetic tape 100. Shortening the maximum seek time of the magnetic tape 300 along the fourth direction is beneficial to improving the addressing speed of the magnetic tape 300.

[0155] For example, the width of the front data track 1211 of the front magnetic layer 120 can be greater than or equal to 300 nm and less than or equal to 400 nm.

[0156] In this way, with a large number of front data tracks 1211 on the front magnetic layer 120, the accuracy and reliability of the data recorded in the front data tracks 1211 can be improved.

[0157] In some possible implementations, the width of the reverse data track 1311 of the reverse magnetic layer 130 is less than or equal to 400 nm.

[0158] In this way, the width of the reverse data track 1311 is smaller, which is conducive to increasing the number of reverse data tracks 1311 of the reverse magnetic layer 130, thereby increasing the capacity of the reverse magnetic layer 130 per unit length, which is conducive to shortening the length of the magnetic tape 100, and thus shortening the maximum seek time of the reverse magnetic layer 130 along the fourth direction.

[0159] For example, the width of the reverse data track 1311 of the reverse magnetic layer 130 can be greater than or equal to 300 nm and less than or equal to 400 nm.

[0160] In this way, with a large number of reverse data tracks 1311 in the reverse magnetic layer 130, the accuracy and reliability of the data recorded in the reverse data tracks 1311 can be improved.

[0161] In some possible implementations, the number of front data tracks 1211 of the front data band 121 is equal to the number of back data tracks 1311 of the back data band 131.

[0162] This facilitates synchronous track switching within a front data band 121 and a back data band 131, enabling synchronous read and write operations within these two bands. Furthermore, the front data band 121 and the back data band 131 are less likely to have wasted space in the first direction, allowing for larger capacities in both bands.

[0163] In some possible implementations, the front data band 121 of the front magnetic layer 120 includes a front data tracks 1211, where a is an integer greater than or equal to 7000.

[0164] In this way, the number of front data tracks 1211 included in the front data tape 121 is relatively large, and the capacity of the front data tape 121 per unit length is relatively large, which is beneficial to shorten the length of the magnetic tape 100, and thus can shorten the maximum seek time of the front data tape 121 along the fourth direction.

[0165] In some possible implementations, the reverse data band 131 of the reverse magnetic layer 130 includes b reverse data tracks 1311, where b is an integer greater than or equal to 7000.

[0166] In this way, the number of reverse data tracks 1311 included in the reverse data tape 131 is relatively large, and the capacity of the reverse data tape 131 per unit length is relatively large, which is beneficial to shorten the length of the magnetic tape 100, and thus can shorten the maximum seek time of the reverse data tape 131 along the fourth direction.

[0167] In some possible implementations, the front data track 1211 of the front magnetic layer 120 and the back data track 1311 of the back magnetic layer 130 are arranged symmetrically with respect to the substrate layer 110.

[0168] This facilitates synchronous addressing and synchronous reading / writing of the front magnetic layer 120 and the back magnetic layer 130. Furthermore, it minimizes wasted space in the front magnetic layer 120 and the back magnetic layer 130, thus increasing the capacity of the magnetic tape 100.

[0169] In some possible implementations, the front magnetic layer 120 includes c front data bands 121, where c is an integer greater than 4.

[0170] In this way, the front magnetic layer 120 includes a large number of front data tapes 121, which is conducive to the arrangement of a large number of front data tracks 1211. The front magnetic layer 120 has a large capacity per unit length, which is conducive to shortening the length of the magnetic tape 100, and thus can shorten the maximum seek time of the front magnetic layer 120 along the fourth direction.

[0171] The front magnetic layer 120 includes a*c front data magnetic tracks 1211.

[0172] For example, the front magnetic layer 120 includes 6 front data bands 121 and 7 front servo bands 122.

[0173] In some possible implementations, the reverse magnetic layer 130 includes d reverse data bands 131, where d is an integer greater than 4.

[0174] In this way, the reverse magnetic layer 130 includes a large number of reverse data tapes 131, which is conducive to the arrangement of a large number of reverse data tracks 1311. The reverse magnetic layer 130 has a large capacity per unit length, which is conducive to shortening the length of the magnetic tape 100, and thus can shorten the maximum seek time of the reverse magnetic layer 130 along the fourth direction.

[0175] The reverse magnetic layer 130 includes b*d reverse data tracks 1311.

[0176] For example, the reverse magnetic layer 130 includes 6 reverse data bands 131 and 7 reverse servo bands 132.

[0177] For example, a*c = b*d.

[0178] For example, the width of the magnetic tape 100 is greater than or equal to 16 mm and less than or equal to 19 mm. Thus, the wider width of the magnetic tape 100 facilitates the arrangement of a larger number of front data tapes 121, back data tapes 131, front data tracks 1211, and back data tracks 1311, resulting in a larger capacity per unit length of the magnetic tape 100. This facilitates shortening the length of the magnetic tape 100, thereby reducing the seek time of the magnetic tape 100 along the fourth direction.

[0179] Figure 6 This is a schematic diagram of a magnetic head provided in an embodiment of this application.

[0180] like Figure 6 As shown, the magnetic head 300 includes a plurality of data readers 320 arranged along a first direction and a plurality of data writers 330 arranged along the first direction. Both the data readers 320 and the data writers 330 are electrically connected to the data processing device 20. The data writers 330 are used to write data to the magnetic tape 100, and the data readers 320 are used to read the data recorded on the magnetic tape 100.

[0181] For example, multiple data readers 320 may be arranged in a straight line along a first direction.

[0182] For example, multiple data writers 330 may be arranged in a straight line along a first direction.

[0183] For example, the data reader 320 and the data writer 330 may be spaced apart in the fourth direction.

[0184] The magnetic head 300 may also include a servo reader 310, which is used to read information from the servo tape to position the magnetic head 300.

[0185] For example, the magnetic head 300 includes a data read / write area, and both the data reader 320 and the data writer 330 are disposed in the data read / write area. Servo readers 310 are disposed on both sides of the data read / write area in the first direction.

[0186] like Figure 2 As shown, the magnetic tape drive includes a magnetic head group corresponding to each magnetic tape 100. The magnetic head group includes two magnetic heads 300, which are used to read or write data on the front magnetic layer 120 and the back magnetic layer 130 of the corresponding magnetic tape 100, respectively.

[0187] The magnetic tape drive also includes a magnetic tape support mechanism 200 corresponding to each magnetic tape 100. The magnetic tape support mechanism 200 supports the corresponding magnetic tape 100 and opens up the part of the corresponding magnetic tape 100 that is not wound on the tape reel 400 so that the magnetic head 300 can read or write data to the magnetic tape 100.

[0188] Specifically, at least one magnetic tape 100 includes a first magnetic tape 100a, which can be the magnetic tape 100 in any of the above embodiments. The substrate layer 110 of the first magnetic tape 100a is a first substrate layer 110, the front magnetic layer 120 of the first magnetic tape 100a is a first front magnetic layer, and the back magnetic layer 130 of the first magnetic tape 100a is a first back magnetic layer. The first front magnetic layer and the first back magnetic layer are respectively located on both sides of the thickness direction of the first substrate layer 110, and both the first front magnetic layer and the first back magnetic layer are used for recording data.

[0189] The magnetic tape storage device 10 includes a first reel 400a and a second reel 400b. The first magnetic tape 100a is wound around the first reel 400a and the second reel 400b. That is, the two reels 400 around which the first magnetic tape 100a is wound are the first reel 400a and the second reel 400b, respectively. The first magnetic tape 100a is loaded into the magnetic tape drive device via the first reel 400a and the second reel 400b.

[0190] When the magnetic tape storage device 10 is an integrated magnetic tape and magnetic head device, the magnetic tape drive includes a first tape reel 400a and a second tape reel 400b.

[0191] In some examples where the magnetic tape storage device 10 includes a magnetic tape device that can be removed from a magnetic tape drive, the magnetic tape device includes a first reel 400a, the magnetic tape drive includes a second reel 400b, and after the magnetic tape device is removed from the magnetic tape drive, the first reel 400a is removed from the magnetic tape drive, and a first magnetic tape 100a is wound on the first reel 400a.

[0192] In some examples where the magnetic tape storage device 10 includes a magnetic tape device that can be removed from a magnetic tape drive, the magnetic tape device includes a first reel 400a and a second reel 400b, both of which are removed from the magnetic tape drive after the magnetic tape device is removed.

[0193] The magnetic head group corresponding to the first magnetic tape 100a is called the first magnetic head group. The two magnetic heads 300 of the first magnetic head group are the first magnetic head 300a and the second magnetic head 300b, respectively. The first magnetic head 300a can be any of the magnetic heads 300 in the above embodiments, and the second magnetic head 300b can be any of the magnetic heads 300 in the above embodiments. Both the first magnetic head 300a and the second magnetic head 300b are electrically connected to the data processing device 20. The first magnetic head 300a faces the first front magnetic layer and is used to read or write data to the first front magnetic layer, and the second magnetic head 300b faces the first back magnetic layer and is used to read or write data to the first back magnetic layer.

[0194] The tape support mechanism 200 corresponding to the first tape 100a is called the first tape support mechanism 200a. The first tape support mechanism 200a supports the first tape 100a. The first magnetic head 300a and the second magnetic head 300b are respectively located on both sides of the thickness direction of the first tape 100a supported by the first tape support mechanism 200a. The first tape support mechanism 200a spreads out the part of the first tape 100a that is not wound on the first tape reel 400a and the second tape reel 400b, so that the first magnetic head 300a and the second magnetic head 300b can read or write data to the first tape 100a.

[0195] In this way, the first magnetic head 300a and the second magnetic head 300b can read or write data to the first front magnetic layer and the first back magnetic layer, respectively. This facilitates the recording of data on both sides of the first magnetic tape 100a, including the first front magnetic layer and the second back magnetic layer, as well as the reading of data recorded on both sides. This allows for an increase in the capacity of the first magnetic tape 100a while maintaining its length, and a reduction in its length while maintaining its capacity. It also facilitates reading and writing to the shorter, larger-capacity first magnetic tape 100a, thus reducing the size of the tape drive and tape storage device 10 while maintaining the same storage capacity, and improving the addressing speed. Furthermore, it allows for simultaneous reading or writing of data to both the first front magnetic layer and the first back magnetic layer, improving the addressing speed and read / write rate of the tape drive. This allows for increased addressing speed and read / write rate while maintaining the same storage capacity of the first magnetic tape 100a. In addition, the data recorded on the first front magnetic layer and the data recorded on the first back magnetic layer can form a redundancy protection. If some of the data recorded on the first front magnetic layer is damaged or lost, it can be filled by the redundant data recorded on the first back magnetic layer, which can make the first magnetic tape 100a have good robustness.

[0196] The first direction is the width direction of the first magnetic tape 100a, which is supported by the first magnetic tape support mechanism 200a.

[0197] The first magnetic head 300a includes a data reader 320 and a data writer 330. The data reader 320 of the first magnetic head 300a is a first front-side data reader, and the data writer 330 of the first magnetic head 300a is a first front-side data writer. The first front-side data writer is used to write data to the first front-side magnetic layer of the first magnetic tape 100a, and the first front-side data reader is used to read data from the first front-side magnetic layer of the first magnetic tape 100a.

[0198] The second magnetic head 300b includes a data reader 320 and a data writer 330. The data reader 320 of the second magnetic head 300b is a first reverse data reader, and the data writer 330 of the first magnetic head 300a is a first reverse data writer. The first reverse data writer is used to write data to the first reverse magnetic layer of the first magnetic tape 100a, and the first reverse data reader is used to read data from the first reverse magnetic layer of the first magnetic tape 100a.

[0199] In some examples, the first magnetic head 300a also includes a servo reader 310, which is a first front servo reader. The first front servo reader is used to read information from the front servo tape 122 of the first front magnetic layer in order to locate the position of the first magnetic head 300a on the first magnetic tape 100a.

[0200] This facilitates independent data writing or reading on the first front magnetic layer. Furthermore, the first magnetic head 300a has high accuracy and reliability in writing or reading data on the first front magnetic layer.

[0201] In some examples, the second magnetic head 300b also includes a servo reader 310, which is a first reverse servo reader. The first reverse servo reader is used to read information from the reverse servo tape 132 of the first reverse magnetic layer in order to locate the position of the second magnetic head 300b on the first magnetic tape 100a.

[0202] This facilitates independent data writing or reading on the first reverse magnetic layer. Furthermore, the second magnetic head 300b has high accuracy and reliability in writing or reading data on the first reverse magnetic layer.

[0203] Both the first magnetic head 300a and the second magnetic head 300b include a servo reader 310, which facilitates the independent positioning of the first magnetic head 300a and the second magnetic head 300b on the first front magnetic layer and the first back magnetic layer, as well as the writing or reading of data.

[0204] In some possible implementations, the number of first front-side data readers of the first magnetic head 300a is the same as the number of first back-side data readers of the second magnetic head 300b.

[0205] In this way, the data processing of the magnetic tape drive device has a high degree of normalization, which facilitates the synchronous reading of the first magnetic head 300a and the second magnetic head 300b.

[0206] In some possible implementations, the number of first front-side data writers of the first magnetic head 300a is the same as the number of first back-side data writers of the second magnetic head 300b.

[0207] In this way, the data processing of the tape drive device has a high degree of normalization, which facilitates the synchronous writing of the first magnetic head 300a and the second magnetic head 300b.

[0208] In some possible implementations, the dimensions of the first front data reader of the first magnetic head 300a in the first direction are the same as the dimensions of the first back data reader of the second magnetic head 300b in the first direction.

[0209] In this way, the data processing of the magnetic tape drive device has a high degree of normalization, which facilitates the synchronous reading of the first magnetic head 300a and the second magnetic head 300b.

[0210] In some possible implementations, the dimensions of the first front data writer of the first magnetic head 300a in the first direction are the same as the dimensions of the first back data writer of the second magnetic head 300b in the first direction.

[0211] In this way, the data processing of the tape drive device has a high degree of normalization, which facilitates the synchronous writing of the first magnetic head 300a and the second magnetic head 300b.

[0212] In some possible implementations, the size of the first front data writer of the first magnetic head 300a in the first direction is less than or equal to 1.1 μm, and the size of the first front data reader of the first magnetic head 300a in the first direction is less than or equal to 220 nm.

[0213] This facilitates the formation of narrower front data tracks 1211 on the first front magnetic layer, enabling reading and writing of the narrower front data tracks 1211. This increases the number of front data tracks 1211 on the first front magnetic layer, thereby increasing the capacity of the first front magnetic layer per unit length. It also helps to shorten the length of the first magnetic tape 100a, thereby shortening the maximum seek time of the first front magnetic layer along the extension direction of the first magnetic tape 100a.

[0214] In some possible implementations, the size of the first reverse data writer of the second magnetic head 300b in the first direction is less than or equal to 1.1 μm, and the size of the first reverse data reader of the second magnetic head 300b in the first direction is less than or equal to 220 nm.

[0215] This facilitates the formation of a narrower feedback data track 1311 in the first reverse magnetic layer, enabling the reading and writing of the narrower feedback data track 1311. This increases the number of reverse data tracks 1311 in the first reverse magnetic layer, thereby increasing the capacity of the first reverse magnetic layer per unit length. It also helps to shorten the length of the first magnetic tape 100a, thereby shortening the maximum seek time of the first reverse magnetic layer along the extension direction of the first magnetic tape 100a.

[0216] For example, the first magnetic head 300a and the second magnetic head 300b are the same magnetic head 300.

[0217] In this way, the data processing of the magnetic tape drive device has a high degree of normalization, which facilitates the synchronous reading and writing of the first magnetic head 300a and the second magnetic head 300b.

[0218] Due to assembly tolerances, creep of the first magnetic tape 100a, etc., the data read by the first magnetic head 300a and the second magnetic head 300b may be out of sync with the data written by the first magnetic head 300a and the second magnetic head 300b. In order to synchronize the data read by the first magnetic head 300a and the second magnetic head 300b with the data written by the first magnetic head 300a and the second magnetic head 300b, in some examples, the data written by the first magnetic head 300a on the first front magnetic layer includes a first-side synchronization code, which is used to indicate the time when the first magnetic head 300a writes data on the first front magnetic layer, and the data written by the second magnetic head 300b on the first back magnetic layer includes a second-side synchronization code, which is used to indicate the time when the second magnetic head 300b writes data on the first back magnetic layer.

[0219] The data processing device 20 may include a first buffer, which can be used to buffer data read by the first magnetic head 300a and the second magnetic head 300b. The data buffered in the first buffer includes a first synchronization code and a second synchronization code for indicating the target time. The data read by the first magnetic head 300a and the data read by the second magnetic head 300b can be aligned using the first synchronization code and the second synchronization code. The data read by the first magnetic head 300a and the data read by the second magnetic head 300b after alignment using the first synchronization code and the second synchronization code can be used as input to the decoder to obtain the data read by the first magnetic head group.

[0220] For example, the data processing device 20 is configured to acquire first data including a first side synchronization code for indicating a target time and second data including a second side synchronization code for indicating a target time. The data processing device 20 is also configured to align the first data with the second data, and acquire data on a first front magnetic layer read by a first magnetic head 300a starting from the first data, and acquire data on a first reverse magnetic layer read by a second magnetic head 300b starting from the second data.

[0221] The first data is the data written by the first magnetic head 300a on the first front magnetic layer at the target time, and the second data is the data written by the second magnetic head 300b on the first back magnetic layer at the target time.

[0222] In some examples where the first magnetic head 300a and the second magnetic head 300b are the same magnetic head 300, the capacity of the first buffer is S1, where S1 ≥ t1 * the write rate of the first magnetic head 300a * the number of magnetic heads 300 * the number of first front-side data readers * the first oversampling ratio * the first redundancy factor * the first digital-to-analog conversion resolution. The write rate of the first magnetic head 300a, the number of magnetic heads 300, the number of first front-side data readers, the first oversampling ratio, the first redundancy factor, and the first digital-to-analog conversion resolution are all known constants. t1 is the difference between the time from the first magnetic head 300a to the data including the first side synchronization code used to indicate the target time and the time from the second magnetic head 300b to the data including the second side synchronization code used to indicate the target time.

[0223] This allows the first buffer to cache data including the first-side synchronization code and the second-side synchronization code, which are used to indicate the same time.

[0224] In some examples, t1 can be obtained as the first magnetic tape 100a moves by the longitudinal position (LPOS) of the front servo tape 122 of the first front magnetic layer and the longitudinal position of the back servo tape 132 of the first back magnetic layer.

[0225] In some examples, t1 can be obtained by the movement speed of the first magnetic tape 100a and the asynchronous distance between the first magnetic head 300a and the second magnetic head 300b when reading from the first magnetic tape 100a. For example, the movement speed of the first magnetic tape 100a can be 4 m / s, the asynchronous distance between the first magnetic head 300a and the second magnetic head 300b when reading from the first magnetic tape 100a can be 2 mm, and t1 can be 0.5 ms.

[0226] For example, t1 is 0.5ms, the write rate of the first magnetic head 300a is 100M, the number of magnetic heads 300 is 2, the number of the first front data readers is 32, the first oversampling ratio is 1.25, the first redundancy factor is 1.2, and the first digital-to-analog conversion resolution is 8.

[0227] For example, the data processing device 20 may include internal memory, which includes a first cache.

[0228] like Figure 2 As shown, the magnetic tape drive device also includes at least one magnetic tape drive component 500, which drives the tape reels 400 to rotate so that the magnetic tape 100 is wound between the two tape reels 400.

[0229] For example, at least one magnetic tape drive component 500 includes a first magnetic tape drive component 500a, which is connected to a first reel 400a and a second reel 400b. The first magnetic tape drive component 500a is used to drive the first reel 400a and the second reel 400b to rotate, so that the first magnetic tape 100a is wound between the first reel 400a and the second reel 400b.

[0230] In some examples, the magnetic tape drive component 500 includes a first magnetic tape drive mechanism 510 and a second magnetic tape drive mechanism 520. The first magnetic tape drive mechanism 510 and the second magnetic tape drive mechanism 520 are respectively connected to two reels 400 wound with the same magnetic tape 100. The first magnetic tape drive mechanism 510 and the second magnetic tape drive mechanism 520 respectively drive the two reels 400 wound with the same magnetic tape 100 to rotate. For example, the first magnetic tape drive mechanism 510 of the first magnetic tape drive component 500a is connected to the first reel 400a and is used to drive the first reel 400a to rotate. The second magnetic tape drive mechanism 520 of the first magnetic tape drive component 500a is connected to the second reel 400b and is used to drive the second reel 400b to rotate.

[0231] In this way, the first tape drive mechanism 510 and the second tape drive mechanism 520 can independently control the two reels 400 wound on the same magnetic tape 100. The transmission delay between the first tape drive mechanism 510 and the second tape drive mechanism 520 and the connected reels 400 is small, making it easier to accurately control the rotation of the two reels 400 wound on the same magnetic tape 100, which helps to reduce the synchronization difference between the two reels 400 wound on the same magnetic tape 100. For example, the first tape drive mechanism 510 of the first tape drive component 500a can accurately control the rotation of the connected first reel 400a, and the second tape drive mechanism 520 of the first tape drive component 500a can accurately control the rotation of the connected second reel 400b. The synchronization difference between the first reel 400a and the second reel 400b is small, which is beneficial for synchronous addressing and synchronous reading and writing of the first front magnetic layer and the first back magnetic layer of the first magnetic tape 100a.

[0232] For example, both the first tape drive mechanism 510 and the second tape drive mechanism 520 can be motors.

[0233] In other examples, the magnetic tape drive component 500 includes a first magnetic tape drive mechanism 510 and a transmission mechanism. One of the two reels 400 wound with the same magnetic tape 100 is connected to the first magnetic tape drive mechanism 510, and the other of the two reels 400 wound with the same magnetic tape 100 is connected to the first magnetic tape drive mechanism 510 via the transmission mechanism. Both reels 400 wound with the same magnetic tape 100 are driven by the first magnetic tape drive mechanism 510. For example, the first magnetic tape drive mechanism 510 of the first magnetic tape drive component 500a is connected to the first reel 400a, and the first magnetic tape drive mechanism 510 of the first magnetic tape drive component 500a is connected to the second reel 400b via the transmission mechanism. Both the first reel 400a and the second reel 400b are driven by the first magnetic tape drive mechanism 510 of the first magnetic tape drive component 500a.

[0234] The magnetic tape drive also includes a head drive assembly 600, to which the magnetic head 300 is connected. The head drive assembly 600 drives the magnetic head 300 to move. Specifically, the head drive assembly 600 can drive the magnetic head 300 to move along a first direction.

[0235] For example, the magnetic head 300 can be connected to the magnetic head drive assembly 600 via the connecting piece 700. For instance, the first magnetic head 300a is connected to the magnetic head drive assembly 600 via the first connecting piece 700a, and the second magnetic head 300b is connected to the magnetic head drive assembly 600 via the second connecting piece 700b.

[0236] For example, the connecting piece 700 can be a spring.

[0237] For example, the magnetic head drive assembly 600 may include a stepper motor 610, a lead screw mechanism 620, and a voice coil motor 630. The stepper motor 610 is connected to the voice coil motor 630 through the lead screw mechanism 620. The voice coil motor 630 is connected to the magnetic head 300 through a connecting piece 700. The stepper motor 610 can drive the voice coil motor 630, the connecting piece 700, and the magnetic head 300 to move through the lead screw mechanism 620. The voice coil motor 630 can drive the magnetic head 300 to move through the connecting piece 700. The stepper motor 610 can be used for coarse adjustment of the position of the magnetic head 300, and the voice coil motor 630 can be used for fine adjustment of the position of the magnetic head 300.

[0238] The magnetic tape drive also includes a housing 800, in which the magnetic tape 100, magnetic head 300, tape reel 400, magnetic tape support mechanism 200, magnetic tape drive component 500, and magnetic head drive assembly 600 are all housed.

[0239] For example, the housing 800 has a first region 830 and a second region 840, the first region 830 for accommodating a first reel 400a and the second region 840 for accommodating a second reel 400b. In other words, the first region 830 is the region within the housing 800 where the first reel 400a is located, and the second region 840 is the region within the housing 800 where the second reel 400b is located.

[0240] The housing 800 includes a first sidewall 810 and a second sidewall 820, which are located on opposite sides of the housing 800 in a third direction. The magnetic tape 100, magnetic head 300, tape reel 400, magnetic tape support mechanism 200, magnetic tape drive component 500 and magnetic head drive assembly 600 are all located between the first sidewall 810 and the second sidewall 820.

[0241] In some possible implementations, the first region 830 and the second region 840 are arranged in a straight line along a second direction, that is, the first reel 400a and the second reel 400b are arranged in a straight line along the second direction. The first magnetic head 300a is located between the first region 830 and the first sidewall 810, and the second magnetic head 300b is located between the second region 840 and the first sidewall 810, that is, the first magnetic head 300a is located between the first reel 400a and the first sidewall 810, and the second magnetic head 300b is located between the second reel 400b and the first sidewall 810.

[0242] In this way, the first magnetic head 300a and the second magnetic head 300b are located on the same side of the whole formed by the first tape 400a and the second tape 400b. The length of the part of the first magnetic tape 100a between the first magnetic head 300a and the second magnetic head 300b is relatively short. The asynchronous distance between the first magnetic head 300a and the second magnetic head 300b when reading on the first magnetic tape 100a is small due to assembly tolerance, creep of the first magnetic tape 100a, etc. This can reduce the demand for the capacity of the first buffer area set up to synchronize the data read by the first magnetic head 300a and the second magnetic head 300b with the data written by the first magnetic head 300a and the second magnetic head 300b.

[0243] For example, the size of the housing 800 in the second direction is greater than or equal to the size of the housing 800 in the third direction, so as to facilitate the arrangement of the larger first reel 400a and second reel 400b.

[0244] In some possible implementations, the magnetic tape support mechanism 200 includes a first front support member 210, a second front support member 220, a first back support member 230, and a second back support member 240. The first front support member 210 and the second front support member 220 of the magnetic tape support mechanism 200 are located on the front-facing side of the corresponding magnetic tape 100, and are used to support the front side of the corresponding magnetic tape 100. In the extending direction of the corresponding magnetic tape 100, a magnetic head 300 for reading or writing data on the front magnetic layer 120 of the corresponding magnetic tape 100 is located between the first front support member 210 and the second front support member 220. The first back support member 230 and the second back support member 240 of the magnetic tape support mechanism 200 are located on the back-facing side of the corresponding magnetic tape 100, and are used to support the back side of the corresponding magnetic tape 100. In the extension direction of the corresponding magnetic tape 100, the magnetic head 300 for reading or writing data on the reverse magnetic layer 130 of the corresponding magnetic tape 100 is located between the first reverse support member 230 and the second reverse support member 240.

[0245] For example, the first front support member 210, the second front support member 220, and the first magnetic head 300a of the first magnetic tape support mechanism 200a are located on the side facing the front of the first magnetic tape 100a supported by the first magnetic tape support mechanism 200a. The first front support member 210 and the second front support member 220 of the first magnetic tape support mechanism 200a support the front of the first magnetic tape 100a. In the extension direction of the first magnetic tape 100a, the first magnetic head 300a is located between the first front support member 210 and the second front support member 220 of the first magnetic tape support mechanism 200a.

[0246] The first reverse support member 230, the second reverse support member 240, and the second magnetic head 300b of the first magnetic tape support mechanism 200a are located on the side facing the reverse side of the first magnetic tape 100a supported by the first magnetic tape support mechanism 200a. The first reverse support member 230 and the second reverse support member 240 of the first magnetic tape support mechanism 200a support the reverse side of the first magnetic tape 100a. In the extension direction of the first magnetic tape 100a, the second magnetic head 300b is located between the first reverse support member 230 and the second reverse support member 240 of the first magnetic tape support mechanism 200a.

[0247] In this way, the first front support member 210 and the second front support member 220 can separate the portion of the magnetic tape 100 located between the first front support member 210 and the second front support member 220, so that the magnetic head 300 between the first front support member 210 and the second front support member 220 can read or write data to the magnetic tape 100. Similarly, the first back support member 230 and the second back support member 240 can separate the portion of the magnetic tape 100 located between the first back support member 230 and the second back support member 240, so that the magnetic head 300 between the first back support member 230 and the second back support member 240 can read or write data to the magnetic tape 100.

[0248] Furthermore, both the first front support member 210 and the second front support member 220 support the front side of the magnetic tape 100, facilitating the movement of the magnetic head 300, which performs reading or writing on the front magnetic layer 120, relative to the magnetic tape 100. This results in higher accuracy and reliability for the positioning, addressing, and data reading or writing of the magnetic head 300, which performs reading or writing on the front magnetic layer 120. Similarly, both the first reverse support member 230 and the second reverse support member 240 support the reverse side of the magnetic tape 100, facilitating the movement of the magnetic head 300, which performs reading or writing on the reverse magnetic layer 130, relative to the magnetic tape 100. This also results in higher accuracy and reliability for the positioning, addressing, and data reading or writing of the magnetic head 300, which performs reading or writing on the reverse magnetic layer 130.

[0249] For example, the first front support 210, the second front support 220, the first back support 230 and the second back support 240 are all roller-shaped structures.

[0250] In some examples, the tape support mechanism 200 also includes a first guide 250 and a second guide 260. In the extension direction of the corresponding magnetic tape 100, the first guide member 250, the first front support member 210, the magnetic head 300 for reading or writing data on the front magnetic layer 120 of the corresponding magnetic tape 100, the second front support member 220, the first back support member 230, the magnetic head 300 for reading or writing data on the back magnetic layer 130 of the corresponding magnetic tape 100, the second back support member 240, and the second guide member 260 are arranged sequentially. The first guide member 250, the first front support member 210, the magnetic head 300 for reading or writing data on the front magnetic layer 120 of the corresponding magnetic tape 100, the second front support member 220, the first back support member 230, the magnetic head 300 for reading or writing data on the back magnetic layer 130 of the corresponding magnetic tape 100, the second back support member 240, and the second guide member 260 are all located between the two reels 400 wound around the corresponding magnetic tape 100.

[0251] For example, in the extension direction of the first magnetic tape 100a, the first guide member 250, the first front support member 210, the first magnetic head 300a, the second front support member 220, the first back support member 230, the second magnetic head 300b, the second back support member 240, and the second guide member 260 of the first magnetic tape support mechanism 200a are arranged sequentially. The first guide 250, the first front support 210, the first magnetic head 300a, the second front support 220, the first back support 230, the second magnetic head 300b, the second back support 240, and the second guide 260 of the first magnetic tape support mechanism 200a are all located between the first reel 400a and the second reel 400b. That is, in the extension direction of the first magnetic tape 100a, the first guide member 250 of the first magnetic tape support mechanism 200a is located between the first tape reel 400a and the first front support member 210 of the first magnetic tape support mechanism 200a, the first front support member 210 of the first magnetic tape support mechanism 200a is located between the first guide member 250 of the first magnetic tape support mechanism 200a and the first magnetic head 300a, the second guide member 260 of the first magnetic tape support mechanism 200a is located between the second tape reel 400b and the second back support member 240 of the first magnetic tape support mechanism 200a, and the second back support member 240 of the first magnetic tape support mechanism 200a is located between the second magnetic head 300b and the second guide member 260 of the first magnetic tape support mechanism 200a.

[0252] This facilitates the winding of the magnetic tape 100 between the two reels 400 and the two heads 300 of the corresponding head group.

[0253] For example, both the first guide member 250 and the second guide member 260 are roller-shaped structures.

[0254] In some examples where the first region 830 and the second region 840 are arranged in a straight line along the second direction, and the first magnetic head 300a is located between the first region 830 and the first sidewall 810, and the second magnetic head 300b is located between the second region 840 and the first sidewall 810, the first guide 250 of the first magnetic tape support mechanism 200a can be located on the side facing the front of the first magnetic tape 100a, and the first guide 250 of the first magnetic tape support mechanism 200a can support the front of the first magnetic tape 100a. The second guide 260 of the first magnetic tape support mechanism 200a can be located on the side facing the front of the first magnetic tape 100a, and the second guide 260 of the first magnetic tape support mechanism 200a can support the front of the first magnetic tape 100a.

[0255] In some other possible implementations, the magnetic tape support mechanism 200 is located on the same side of the thickness direction of the corresponding magnetic tape 100, and the magnetic tape support mechanism 200 supports the front or back of the corresponding magnetic tape 100. For example, the magnetic tape support mechanism 200 is located on the side where the front of the magnetic tape 100 faces, and the magnetic tape support mechanism 200 supports the front of the corresponding magnetic tape 100. Alternatively, the magnetic tape support mechanism 200 is located on the side where the back of the corresponding magnetic tape 100 faces, and the magnetic tape support mechanism 200 supports the back of the corresponding magnetic tape 100.

[0256] Figure 7 This is a schematic diagram of another magnetic tape storage device provided in an embodiment of this application.

[0257] like Figure 7 As shown, in some possible embodiments, the first region 830 and the second region 840 are staggered in both the second direction and the third direction. That is, the first reel 400a and the second reel 400b are staggered in both the second direction and the third direction. The distance between the first region 830 and the first sidewall 810 is greater than the distance between the second region 840 and the first sidewall 810, and the distance between the first region 830 and the second sidewall 820 is less than the distance between the second region 840 and the second sidewall 820. The first magnetic head 300a is located between the first region 830 and the first sidewall 810, and the second magnetic head 300b is located between the second region 840 and the second sidewall 820. In other words, the distance between the first reel 400a and the first sidewall 810 is greater than the distance between the second reel 400b and the first sidewall 810, and the distance between the first reel 400a and the second sidewall 820 is less than the distance between the second reel 400b and the second sidewall 820. The first magnetic head 300a is located between the first reel 400a and the first sidewall 810, and the second magnetic head 300b is located between the second reel 400b and the second sidewall 820.

[0258] In this way, the center of gravity of the magnetic tape storage device 10 can be close to the center of the outer casing 800, and the magnetic tape storage device 10 is less likely to experience imbalance or other problems when the first tape reel 400a and the second tape reel 400b rotate.

[0259] In some examples where the first magnetic head 300a is located between the first region 830 and the first sidewall 810, and the second magnetic head 300b is located between the second region 840 and the second sidewall 820, the first guide 250 of the first magnetic tape support mechanism 200a can be located on the side facing the front of the first magnetic tape 100a, and the first guide 250 of the first magnetic tape support mechanism 200a can support the front of the first magnetic tape 100a. The second guide 260 of the first magnetic tape support mechanism 200a can be located on the side facing the back of the first magnetic tape 100a, and the second guide 260 of the first magnetic tape support mechanism 200a can support the back of the first magnetic tape 100a.

[0260] In some examples where the magnetic tape support mechanism 200 includes a first front support member 210, a second front support member 220, a first back support member 230, and a second back support member 240, the magnetic tape support mechanism 200 may also include a third guide member 270 and a fourth guide member 280. In the extension direction of the corresponding magnetic tape 100, the first front support member 210, the magnetic head 300 for reading or writing data on the front magnetic layer 120 of the corresponding magnetic tape 100, the second front support member 220, the third guide member 270, the fourth guide member 280, the first back support member 230, the magnetic head 300 for reading or writing data on the back magnetic layer 130 of the corresponding magnetic tape 100, and the second back support member 240 are sequentially arranged. The first front support member 210, for reading or writing data on the front magnetic layer 120 of the corresponding magnetic tape 100, the magnetic head 300 for reading or writing data on the back magnetic layer 130 of the corresponding magnetic tape 100, and the second back support member 240 are sequentially arranged. The magnetic head 300 for reading or writing data on the front magnetic layer 120, the second front support 220, the third guide 270, the fourth guide 280, the first reverse support 230, the magnetic head 300 for reading or writing data on the reverse magnetic layer 130 of the corresponding magnetic tape 100, and the second reverse support 240 are all located between the two tape reels 400 wound around the corresponding magnetic tape 100. The third guide 270 supports the front side of the corresponding magnetic tape 100, and the fourth guide 280 supports the reverse side of the corresponding magnetic tape 100.

[0261] For example, in the extension direction of the first magnetic tape 100a, the first front support member 210, the first magnetic head 300a, the second front support member 220, the third guide member 270, the fourth guide member 280, the first back support member 230, the second magnetic head 300b, and the second back support member 240 of the first magnetic tape support mechanism 200a are arranged sequentially. The second front support member 220 of the first magnetic tape support mechanism 200a, the third guide member 270 of the first magnetic tape support mechanism 200a, the fourth guide member 280 of the first magnetic tape support mechanism 200a, the first back support member 230 of the first magnetic tape support mechanism 200a, the second magnetic head 300b, and the second back support member 240 of the first magnetic tape support mechanism 200a are all located between the first reel 400a and the second reel 400b. The third guide member 270 of the first magnetic tape support mechanism 200a supports the front of the first magnetic tape 100a, and the fourth guide member 280 of the first magnetic tape support mechanism 200a supports the back of the first magnetic tape 100a.

[0262] This makes it easier for the magnetic tape 100 to roll between the two magnetic heads 300, which are relatively far apart.

[0263] In some possible implementations, the magnetic tape drive device includes a plurality of head drive assemblies 600. Each head drive assembly 600 includes a first head drive assembly 600a and a second head drive assembly 600b. A first head 300a is connected to the first head drive assembly 600a and is used to drive the first head 300a to move. A second head 300b is connected to the second head drive assembly 600b and is used to drive the second head 300b to move. In this case, the first head 300a can be connected to the first head drive assembly 600a via a first connecting piece 700a, and the second head 300b can be connected to the second head drive assembly 600b via a second connecting piece 700b.

[0264] In this way, the first magnetic head 300a and the second magnetic head 300b are driven independently, which facilitates the accurate positioning of the first magnetic head 300a and the second magnetic head 300b on the first magnetic tape 100a, so as to realize synchronous addressing and synchronous reading and writing of the first magnetic head 300a and the second magnetic head 300b.

[0265] In some possible implementations, the first magnetic head 300a and the second magnetic head 300b are connected to the same head drive assembly 600, and the first magnetic head 300a and the second magnetic head 300b are driven by the same head drive assembly 600. In this case, the first magnetic head 300a and the second magnetic head 300b can be connected to the same head drive assembly 600 respectively through the first connecting piece 700a and the second connecting piece 700b, and one of the first connecting piece 300a and the second connecting piece 300b can be bypassed from one side of the first magnetic tape 100a in the width direction.

[0266] In this way, fewer head drive assemblies 600 are needed, and each head drive assembly 600 occupies less space, allowing for a simpler structure within the housing 800 and facilitating the arrangement of other components. For example, a longer first magnetic tape 100a can be arranged within the housing 800. In this case, a first magnetic tape 100a with a storage capacity of 9-12TB can be arranged within a 2.5-inch housing 800.

[0267] For example, the first magnetic head 300a and the connected magnetic head drive assembly 600 are located on the same side of the thickness direction of the first magnetic tape 100a, the second magnetic head 300b and the connected magnetic head 300 drive device are located on different sides of the thickness direction of the first magnetic tape 100a, and the second connecting piece 700b passes around the first magnetic tape 100a from one side of the width direction of the first magnetic tape 100a.

[0268] Figure 8 This is a schematic diagram of another magnetic tape storage device provided in an embodiment of this application.

[0269] like Figure 8 As shown, the tape drive also includes a communication interface 850, the magnetic head 300 is electrically connected to the communication interface 850, and the communication interface 850 is used to electrically connect to the data processing device 20.

[0270] For example, both the first magnetic head 300a and the second magnetic head 300b are electrically connected to the communication interface 850.

[0271] For example, the tape drive also includes a circuit board, on which a communication interface 850 may be disposed, and the magnetic head 300 is electrically connected to the circuit board, such that the magnetic head 300 is electrically connected to the communication interface 850 through the circuit board.

[0272] Taking a first magnetic tape 100a comprising 6 front data tapes 121 and 6 back data tapes 131, a first front data writer and a first back data writer having dimensions of 1.1µm in the first direction, and a first front data reader and a first back data reader having dimensions of 220nm in the first direction, as an example, compared to products using ninth-generation linear tape open (LTO) data storage technology, the data track density of the first magnetic tape 100a in the first direction can be comparable to that of products using ninth-generation linear tape open (LTO) data storage technology. The width of the first magnetic tape 100a can be 1.5 times that of products using open (LTO) data storage technology. The storage density of products using the ninth-generation linear magnetic tape open data storage technology is 0.018TB / m, and the storage density of the first magnetic tape 100a is 3*1.5*2*0.018TB / m=0.162TB / m. To achieve a storage capacity of 18TB, the effective length of the first magnetic tape 100a can be 112m. With a 10m cleaning strip reserved on the first magnetic tape 100a and a 15m protection interval reserved at each end, the length of the first magnetic tape 100a can be 152m.

[0273] To shorten the seek time between the first magnetic head 300a and the second magnetic head 300b and the ends of the first magnetic tape 100a, when the tape drive is in standby mode, the middle position of the first magnetic tape 100a can be located at the first head group. That is, the first head group stays at the middle position of the first magnetic tape 100a. Assuming the seek speed on the first magnetic tape 100a is 20 m / s and the effective length of the first magnetic tape 100a is 110 m, the distance from the first head group to the farthest effective position of the first magnetic tape 100a is 55 m, and the time taken for the first head group to reach the farthest effective position of the first magnetic tape 100a is 2.75 s. Through data distribution, frequently used data can be recorded near the middle position of the first magnetic tape 100a, reducing the average seek time of the tape storage device 10 to 1.375 s. Here, the seek speed is the speed at which the magnetic head 300 moves relative to the magnetic tape 100.

[0274] Assuming the casing 800 is 3.5 inches and the magnetic tape storage device 10 needs to store 18TB of data, the first tape reel 400a and the second tape reel 400b are respectively positioned at opposite corners of the casing 800. The first magnetic head 300a is located between the first tape reel 400a and the first side wall 810, and the second magnetic head 300b is located between the second tape reel 400b and the second side wall 820. The inner diameter of both the first tape reel 400a and the second tape reel 400b can be 24mm. That is to say, the first magnetic tape 10... 0a is wound onto the first tape reel 400a and the second tape reel 400b, both with an inner diameter of 24mm. The thickness of the first tape 100a is 6µm. When the first tape 100a is completely wound onto the first tape reel 400a, the maximum outer diameter of the first tape 100a and the first tape reel 400a is 41.6mm. After reserving a safety gap, the first tape reel 400a can occupy a first circular area with a diameter of 45mm, and the second tape reel 400b can occupy a second circular area with a diameter of 45mm.

[0275] The first magnetic head 300a, the first magnetic head drive assembly 600a, the first front support member 210 of the first magnetic tape support mechanism 200a, the second front support member 220 of the first magnetic tape support mechanism 200a, the first guide member 250 of the first magnetic tape support mechanism 200a, and the third guide member 270 of the first magnetic tape support mechanism 200a can be arranged in a first rectangular area of ​​80mm*45mm (e.g., Figure 8 Within the rectangular area outlined by the dashed line in the lower left corner, the second magnetic head 300b, the second magnetic head drive assembly 600b, the first reverse support member 230 of the first magnetic tape support mechanism 200a, the second reverse support member 240 of the first magnetic tape support mechanism 200a, the second guide member 260 of the first magnetic tape support mechanism 200a, and the fourth guide member 280 of the first magnetic tape support mechanism 200a can be arranged within a second rectangular area of ​​80mm*45mm (e.g., Figure 8Within the rectangular area outlined by the dashed line in the upper right corner, the wall thickness of the outer casing 800 is 2-3mm. The distance between the first circular area and the first rectangular area in the third direction is 2mm. The distance between the first circular area and the second sidewall 820 is 5mm. The distance between the first rectangular area and the first sidewall 810 is 5mm. The distance between the sidewall of the outer casing 800 on the side closest to the first circular area and the first rectangular area in the second direction and the first circular area and the first rectangular area is 5mm. The distance between the first circular area and the second rectangular area in the second direction is 5mm. The distance between the second circular area and the first rectangular area in the third direction is 2mm. The distance between the second circular area and the first sidewall 810 is 5mm. The distance between the second rectangular area and the second sidewall 820 is 5mm. A 12mm space is reserved on the side of the outer casing 800 on the side closest to the second circular area and the second rectangular area in the second direction for setting up the communication interface 850 and the sidewall of the outer casing 800.

[0276] Figure 9 This is a schematic diagram of another magnetic tape storage device provided in an embodiment of this application.

[0277] like Figure 9 As shown, the magnetic tape storage device 10 includes multiple magnetic tapes 100, including a first magnetic tape 100a and a second magnetic tape 100b. The second magnetic tape 100b can be any of the magnetic tapes 100 described in the above embodiments. The width direction of both the first magnetic tape 100a and the second magnetic tape 100b is a first direction. The substrate layer 110 of the second magnetic tape 100b is a second substrate layer 110, the front magnetic layer 120 of the second magnetic tape 100b is a second front magnetic layer, and the back magnetic layer 130 of the second magnetic tape 100b is a second back magnetic layer. The second front magnetic layer and the second back magnetic layer are located on opposite sides of the thickness direction of the second substrate layer 110, and both the second front magnetic layer and the second back magnetic layer are used for recording data.

[0278] The magnetic tape storage device 10 also includes a third reel 400c and a fourth reel 400d, on which the second magnetic tape 100b is wound. That is, the two reels 400 on which the second magnetic track 100b is wound are the third reel 400c and the fourth reel 400d. The second magnetic tape 100b is loaded into the magnetic tape drive via the third reel 400c and the fourth reel 400d.

[0279] The magnetic head group corresponding to the second magnetic tape 100b is called the second magnetic head group. The two magnetic heads 300 of the second magnetic head group are the third magnetic head 300c and the fourth magnetic head 300d, respectively. The third magnetic head 300c can be any of the magnetic heads 300 in the above embodiments, and the fourth magnetic head 300d can be any of the magnetic heads 300 in the above embodiments. Both the third magnetic head 300c and the fourth magnetic head 300d are electrically connected to the data processing device 20. The third magnetic head 300c faces the second front magnetic layer and is used to read or write data to the second front magnetic layer, and the fourth magnetic head 300d faces the second back magnetic layer and is used to read or write data to the second back magnetic layer.

[0280] The tape support mechanism 200 corresponding to the second tape 100b is called the second tape support mechanism 200b. The second tape support mechanism 200b supports the second tape 100b. The third magnetic head 300c and the fourth magnetic head 300d are located on both sides of the thickness direction of the second tape 100b supported by the second tape support mechanism 200b. The second tape support mechanism 200b opens up the part of the second tape 100b that is not wound on the third tape reel 400c and the fourth tape reel 400d, so that the third magnetic head 300c and the fourth magnetic head 300d can read or write data to the second tape 100b.

[0281] In this way, the magnetic tape storage device 10 can store data using multiple magnetic tapes 100. While maintaining the same storage capacity, the length of each magnetic tape 100 can be shortened, further improving the addressing speed. Furthermore, the first and second head groups can read or write data to the first magnetic tape 100a and the second magnetic tape 100b respectively, facilitating data recording on both sides of the first magnetic tape 100a and the second magnetic tape 100b, as well as reading data recorded on both sides of the first magnetic tape 100a and the second magnetic tape 100b. Additionally, it facilitates simultaneous reading or writing of data to the first magnetic tape 100a and the second magnetic tape 100b, improving the addressing speed and read / write rate of the magnetic tape drive. This allows for an increase in addressing speed and read / write rate while maintaining the same storage capacity of the magnetic tape 100. In addition, the data recorded on the first magnetic tape 100a and the data recorded on the second magnetic tape 100b can form a redundancy protection. If some of the data recorded on the first magnetic tape 100a is damaged or lost, it can be filled by the redundant data recorded on the second magnetic tape 100b, which can make the magnetic tape storage device 10 have better robustness.

[0282] For example, the first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c and the fourth magnetic head 300d are all electrically connected to the communication interface 850.

[0283] The third magnetic head 300c includes a data reader 320 and a data writer 330. The data reader 320 of the third magnetic head 300c is a second front-side data reader, and the data writer 330 of the third magnetic head 300c is a second front-side data writer. The second front-side data writer is used to write data to the second front-side magnetic layer of the second magnetic tape 100b, and the second front-side data reader is used to read data from the second front-side magnetic layer of the second magnetic tape 100b.

[0284] The fourth magnetic head 300d includes a data reader 320 and a data writer 330. The data reader 320 of the fourth magnetic head 300d is a second reverse side data reader, and the data writer 330 of the fourth magnetic head 300d is a second reverse side data writer. The second reverse side data writer is used to write data to the second reverse side magnetic layer of the second magnetic tape 100b, and the second reverse side data reader is used to read data from the second reverse side magnetic layer of the second magnetic tape 100b.

[0285] In some examples, the third magnetic head 300c also includes a servo reader 310, which is a second front servo reader. The second front servo reader is used to read information from the front servo tape 122 of the second front magnetic layer in order to locate the position of the third magnetic head 300c on the second magnetic tape 100b.

[0286] In some examples, the fourth magnetic head 300d also includes a servo reader 310, which is a second reverse servo reader. The second reverse servo reader is used to read information from the reverse servo tape 132 of the second reverse magnetic layer in order to locate the position of the fourth magnetic head 300d on the second magnetic tape 100b.

[0287] In some examples, the first head 300a, the second head 300b, the third head 300c, and the fourth head 300d are the same head 300.

[0288] Due to speed and position differences between the first magnetic tape 100a and the second magnetic tape 100b, the data read by the first and second head groups may be out of sync with the data written by the first and second head groups. To synchronize the data read by the first and second head groups with the data written by the first and second head groups, in some examples, the data written by the first head group on the first magnetic tape 100a includes a first synchronization code, which indicates the time when the first head group writes data on the first magnetic tape 100a. The data written by the second head group on the second magnetic tape 100b includes a second synchronization code, which indicates the time when the second head group writes data on the second magnetic tape 100b.

[0289] The data processing device 20 may include a second buffer, which can be used to buffer data read by the first head group and the second head group. The data buffered in the second buffer includes a first synchronization code and a second synchronization code for indicating the target time. The data read by the first head group and the second head group can be aligned using the first synchronization code and the second synchronization code. The data read by the first head group and the second head group after alignment using the first synchronization code and the second synchronization code can be used as input to the decoder to obtain the data read by the tape drive device.

[0290] For example, the data processing device 20 is configured to acquire third data including a first synchronization code for indicating a target time and fourth data including a second synchronization code for indicating a target time. The data processing device 20 is also configured to align the third data with the fourth data, and acquire data on the first magnetic tape 100a read by the first magnetic head group starting from the third data, and acquire data on the second magnetic tape 100b read by the second magnetic head group starting from the fourth data.

[0291] The third data is the data written by the first magnetic head group on the first magnetic tape 100a at the target time, and the fourth data is the data written by the second magnetic head group on the second magnetic tape 100b at the target time.

[0292] In some examples where the first head 300a, the second head 300b, the third head 300c, and the fourth head 300d are the same head 300, the capacity of the second buffer is S2, where S2 ≥ t2 * the head write rate of the first head 300a * the number of heads 300 * the number of first front-side data readers * the second oversampling ratio * the second redundancy factor * the second digital-to-analog conversion resolution. The head write rate of the first head 300a, the number of heads 300, the number of first front-side data readers, the second oversampling ratio, the second redundancy factor, and the second digital-to-analog conversion resolution are all known constants. t2 is the difference between the time from the first head group to the data including the first synchronization code used to indicate the target time and the time from the second head group to the data including the second synchronization code used to indicate the target time.

[0293] This allows the second buffer to cache data including both the first and second synchronization codes used to indicate the same time.

[0294] For example, the data written by the third magnetic head 300c on the second front magnetic layer includes a third-side synchronization code, which is used to indicate the time when the third magnetic head 300c writes data on the second front magnetic layer. The data written by the fourth magnetic head 300d on the second back magnetic layer includes a fourth-side synchronization code, which is used to indicate the time when the fourth magnetic head 300d writes data on the second back magnetic layer. The data read by the third magnetic head 300c and the data read by the fourth magnetic head 300d after being aligned with the third and fourth-side synchronization codes can be used as input to the decoder to obtain the data read by the second magnetic head group.

[0295] For example, the internal memory of the data processing device 20 includes a second cache.

[0296] For example, at least one magnetic tape drive component 500 includes a second magnetic tape drive component 500b, which is connected to a third reel 400c and a fourth reel 400d. The second magnetic tape drive component 500b is used to drive the third reel 400c and the fourth reel 400d to rotate, so that the second magnetic tape 100b is wound between the third reel 400c and the fourth reel 400d.

[0297] For example, the first tape drive mechanism 510 of the second tape drive component 500b is connected to the third tape reel 400c, and the first tape drive mechanism 510 of the second tape drive component 500b is used to drive the third tape reel 400c to rotate. The second tape drive mechanism 520 of the second tape drive component 500b is connected to the fourth tape reel 400d, and the second tape drive mechanism 520 of the second tape drive component 500b is used to drive the fourth tape reel 400d to rotate.

[0298] For example, the first reel 400a, the second reel 400b, the third reel 400c, and the fourth reel 400d can be arranged in a matrix. The first reel 400a and the second reel 400b are arranged in a straight line in the third direction, the third reel 400c and the fourth reel 400d are arranged in a straight line in the third direction, the first reel 400a and the third reel 400c are arranged in a straight line in the second direction, and the second reel 400b and the fourth reel 400d are arranged in a straight line in the second direction.

[0299] In this way, the center of gravity of the magnetic tape storage device 10 can be close to the center of the outer casing 800, and the magnetic tape storage device 10 is less likely to experience imbalance or other problems when the first tape reel 400a, the second tape reel 400b, the third tape reel 400c and the fourth tape reel 400d rotate.

[0300] In some possible implementations, the first magnetic tape support mechanism 200a is located on the side of the first magnetic tape 100a opposite to the second magnetic tape 100b, and the second magnetic tape support mechanism 200b is located on the side of the second magnetic tape 100b opposite to the first magnetic tape 100a.

[0301] In some examples, the third head 300c is connected to the head drive assembly 600 via the third connecting piece 700c, and the fourth head 300d is connected to the head drive assembly 600 via the fourth connecting piece 700d.

[0302] In some possible implementations, the first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c, and the fourth magnetic head 300d are connected to the same head drive assembly 600 of the magnetic tape drive device. In this case, the first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c, and the fourth magnetic head 300d can be connected to the same head drive assembly 600 via first connecting pieces 700a, second connecting pieces 700b, third connecting pieces 700c, and fourth connecting pieces 700d, respectively. One of the first connecting pieces 300a and second connecting pieces 300b can be routed around the first magnetic tape 100a from one side in the width direction, and one of the third connecting pieces 300c and fourth connecting pieces 300d can be routed around the second magnetic tape 100b from one side in the width direction.

[0303] In this way, fewer head drive assemblies 600 are needed, and the head drive assemblies 600 occupy less space, which makes the structure inside the housing 800 simpler and facilitates the arrangement of other components.

[0304] The first magnetic tape 100a and the second magnetic tape 100b are the same magnetic tape 100. Taking the storage density of the first magnetic tape 100a and the second magnetic tape 100b as both being 0.162TB / m as an example, in order to achieve a storage capacity of 18TB, the magnetic tape storage device 10 can have a storage capacity of 9TB for the first magnetic tape 100a and the second magnetic tape 100b respectively, making the effective length of the first magnetic tape 100a and the second magnetic tape 100b 56m. With a 10m cleaning strip reserved on both the first magnetic tape 100a and the second magnetic tape 100b, and a 15m protection interval reserved at each end, the total length of the first magnetic tape 100a and the second magnetic tape 100b is 81m.

[0305] When the tape drive is in standby mode, the middle position of the first tape 100a can be located at the first head group, and the middle position of the second tape 100b can be located at the second head group. That is, the first head group is located at the middle position of the first tape 100a, and the second head group is located at the middle position of the second tape 100b. Assuming that the seek speed of the first tape 100a and the second tape 100b is 20m / s, and the effective length of the first tape 100a and the second tape 100b is 56m, the distance from the first head group to the farthest effective position of the first tape 100a is 28m, the distance from the second head group to the farthest effective position of the second tape 100b is 28m, the time from the first head group to the farthest effective position of the first tape 100a is 1.4s, and the time from the second head group to the farthest effective position of the second tape 100b is 1.4s. By distributing data, frequently used data can be recorded near the middle of the first magnetic tape 100a and the second magnetic tape 100b, resulting in an average seek time of 0.7s for the magnetic tape storage device 10. When the capacity of the magnetic tape storage device 10 is 24TB, the first magnetic tape 100a and the second magnetic tape 100b can each have a storage capacity of 12TB, at which point the average seek time of the magnetic tape storage device 10 is 0.93s.

[0306] like Figure 9 As shown, assuming the outer casing 800 is 3.5 inches and the magnetic tape storage device 10 needs to store 18TB of data, the inner diameters of the first tape reel 400a, the second tape reel 400b, the third tape reel 400c, and the fourth tape reel 400d can all be 24mm. That is, the first magnetic tape 100a is wound around the first tape reel 400a and the second tape reel 400b, both with an inner diameter of 24mm. The second magnetic tape 100b is wound around the third tape reel 400c and the fourth tape reel 400d, both with inner diameters of 24mm. The thickness of the first magnetic tape 100a and the second magnetic tape 100b is both 6µm, and the length of the first magnetic tape 100a and the second magnetic tape 100b is both 81m. The first magnetic tape 100a is completely wound around the first tape reel 400a. When the first magnetic tape 100a and the first reel 400a are wound on the third reel 400c, the maximum outer diameter of the first magnetic tape 100a and the third reel 400c is 17.2mm. After reserving a safety gap, the first reel 400a can occupy a third circular area with a diameter of 38mm, the second reel 400b can occupy a fourth circular area with a diameter of 38mm, the third reel 400c can occupy a fifth circular area with a diameter of 38mm, and the fourth reel 400d can occupy a sixth circular area with a diameter of 38mm. The third, fourth, fifth, and sixth circular areas are arranged in a matrix.

[0307] The first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c, the fourth magnetic head 300d, the first magnetic tape support mechanism 200a, the second magnetic tape support mechanism 200b, and the magnetic head drive assembly 600 can be arranged in a third rectangular area of ​​45mm*45mm (e.g., Figure 9 Within the rectangular area (defined by the dashed box), the third rectangular area is located between the third, fourth, fifth, and sixth circular areas; that is, the third rectangular area is located in the middle of the outer casing 800. The distance between the third and fourth circular areas in the third direction is 6mm, the distance between the fifth and sixth circular areas in the third direction is 6mm, the distance between the third and fifth circular areas and the outer wall of the second sidewall 820 is 10mm, the distance between the fourth and sixth circular areas and the outer wall of the first sidewall 810 is 10mm, the distance between the outer wall of the outer casing 800 on the side closest to the third and fourth circular areas in the second direction and the third and fourth circular areas is 5mm, the distance between the third and fourth circular areas and the third rectangular area in the second direction is 2mm, and the distance between the fifth and sixth circular areas and the third rectangular area in the second direction is 2mm. The distance between the third rectangular area and the outer wall of the first sidewall 810 and the outer wall of the second sidewall 820 in the third direction is equal. The outer shell 800 has a 17mm reserved on the side of the second direction near the fifth circular area and the sixth circular area for setting the communication interface 850 and the side wall of the outer shell 800.

[0308] Figure 10 This is a schematic diagram of another magnetic tape storage device provided in an embodiment of this application.

[0309] like Figure 10As shown, in some possible embodiments, the plurality of head drive assemblies 600 include a first head drive assembly 600a and a third head drive assembly 600c. The first head 300a and the second head 300b are connected to the first head drive assembly 600a, and the first head drive assembly 600a is used to drive the first head 300a and the second head 300b to move. The third head 300c and the fourth head 300d are connected to the third head drive assembly 600c, and the third head drive assembly 600c is used to drive the third head 300c and the fourth head 300d to move. At this time, the first magnetic head 300a and the second magnetic head 300b can be connected to the first magnetic head drive assembly 600a through the first connecting piece 700a and the second connecting piece 700b, respectively. The third magnetic head 300c and the fourth magnetic head 300d can be connected to the third magnetic head drive assembly 600c through the third connecting piece 700c and the fourth connecting piece 700d, respectively. One of the first connecting piece 300a and the second connecting piece 300b can be bypassed from one side of the first magnetic tape 100a in the width direction. One of the third connecting piece 300c and the fourth connecting piece 300d can be bypassed from one side of the second magnetic tape 100b in the width direction.

[0310] In this way, the first and second head groups are driven independently, which facilitates the accurate positioning of the first and second head groups on the first magnetic tape 100a and the second magnetic tape 100b, respectively, enabling synchronous addressing and synchronous reading / writing of the first and second head groups. Furthermore, the number of head drive assemblies 600 required is smaller, and the head drive assemblies 600 occupy less space, allowing for a simpler structure within the housing 800 and facilitating the arrangement of other components.

[0311] For example, the magnetic tape drive device also includes a partition 860 disposed within the housing 800. The partition 860 is perpendicular to the second direction and divides the housing 800 into a first part and a second part. The first part and the second part are respectively located on both sides of the partition 860 in the second direction. The first magnetic tape 100a, the first magnetic tape support mechanism 200a, the first reel 400a, the second reel 400b, the first magnetic head drive assembly 600a, the first magnetic head 300a, and the second magnetic head 300b are located in the first part. The second magnetic tape 100b, the second magnetic tape support mechanism 200b, the third reel 400c, the fourth reel 400d, the third magnetic head drive assembly 600c, the third magnetic head 300c, and the fourth magnetic head 300d are located in the second part.

[0312] like Figure 10As shown, assuming the outer casing 800 is 3.5 inches and the magnetic tape storage device 10 needs to store 18TB of data, the first magnetic tape support mechanism 200a, the first tape reel 400a, the second tape reel 400b, the first magnetic head drive assembly 600a, the first magnetic head 300a, and the second magnetic head 300b are arranged in a fourth rectangular area of ​​45mm*20mm (e.g., Figure 10 Within the rectangular area indicated by the dashed box on the left, the second magnetic tape support mechanism 200b, the third tape reel 400c, the fourth tape reel 400d, the third magnetic head drive assembly 600c, the third magnetic head 300c, and the fourth magnetic head 300d are arranged in a fifth rectangular area of ​​45mm*20mm (e.g., ...). Figure 10 Within the rectangular area (within the right dashed frame in the image), the fourth rectangular area is located between the third circular area, the fourth circular area, and the partition 860; the fifth rectangular area is located between the fifth circular area, the sixth circular area, and the partition 860; the distance between the third and fourth circular areas in the third direction is 6mm; the distance between the fifth and sixth circular areas in the third direction is 6mm; the distance between the third and fifth circular areas and the outer wall of the second sidewall 820 is 10mm; the distance between the fourth and sixth circular areas and the outer wall of the first sidewall 810 is 10mm; the distance between the outer wall of the outer shell 800 on the side closest to the third and fourth circular areas in the second direction and the third and fourth circular areas is 5mm; the distance between the third and fourth circular areas and the fourth rectangular area in the second direction is 2mm; the distance between the fourth rectangular area and the partition 860 in the second direction is 2mm; the thickness of the partition 860 is 1mm; the distance between the fifth and sixth circular areas and the fifth rectangular area in the second direction is 2mm; and the distance between the fifth rectangular area and the partition 860 in the second direction is 2mm. The fourth rectangular area is equidistant from the outer walls of the first sidewall 810 and the second sidewall 820 in the third direction. The fifth rectangular area is equidistant from the outer walls of the first sidewall 810 and the second sidewall 820 in the third direction. The outer shell 800 has a 17mm margin on the side closest to the fifth and sixth circular areas in the second direction for setting up the communication interface 850 and the sidewall of the outer shell 800.

[0313] When the casing 800 is 3.5 inches, referring to the component layout in the second part, the second magnetic tape 100b can have a capacity of 9-12TB, so as to realize 9-12TB of data storage on the 2.5-inch magnetic tape storage device 10.

[0314] Figure 11 This is a schematic diagram of another magnetic tape storage device provided in an embodiment of this application.

[0315] like Figure 11As shown, in some possible embodiments, the plurality of head drive assemblies 600 include a first head drive assembly 600a, a second head drive assembly 600b, a third head drive assembly 600c, and a fourth head drive assembly 600d. The first head 300a is connected to the first head drive assembly 600a, the second head 300b is connected to the second head drive assembly 600b, the third head 300c is connected to the third head drive assembly 600c, and the fourth head 300d is connected to the fourth head drive assembly 600d. In this case, the first head 100a can be connected to the first head drive assembly 600a via a first connecting piece 700a, the second head 100b can be connected to the second head drive assembly 600b via a second connecting piece 700b, the third head 100c can be connected to the third head drive assembly 600c via a third connecting piece 700c, and the fourth head 100d can be connected to the fourth head drive assembly 600d via a fourth connecting piece 700d.

[0316] In this way, the first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c, and the fourth magnetic head 300d can be driven independently, which facilitates the accurate positioning of the first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c, and the fourth magnetic head 300d, so as to achieve synchronous addressing and synchronous read / write of the first magnetic head 300a, the second magnetic head 300b, the third magnetic head 300c, and the fourth magnetic head 300d.

[0317] The first magnetic tape 100a, the first magnetic tape support mechanism 200a, the first reel 400a, the second reel 400b, the first magnetic head drive assembly 600a, the second magnetic head drive assembly 600b, the first magnetic head 300a, and the second magnetic head 300b are located in the first part, while the second magnetic tape 100b, the second magnetic tape support mechanism 200b, the third reel 400c, the fourth reel 400d, the third magnetic head drive assembly 600c, the fourth magnetic head drive assembly 600d, the third magnetic head 300c, and the fourth magnetic head 300d are located in the second part.

[0318] Assuming the outer casing 800 is 3.5 inches and the magnetic tape storage device 10 needs to store 18TB of data, the first magnetic tape support mechanism 200a, the first tape reel 400a, the second tape reel 400b, the first magnetic head drive assembly 600a, the second magnetic head drive assembly 600b, the first magnetic head 300a, and the second magnetic head 300b are arranged in a sixth rectangular area of ​​70mm*25mm (e.g., Figure 11 Within the rectangular area indicated by the dashed box on the left, the second magnetic tape support mechanism 200b, the third tape reel 400c, the fourth tape reel 400d, the third magnetic head drive assembly 600c, the fourth magnetic head drive assembly 600d, the third magnetic head 300c, and the fourth magnetic head 300d are arranged in a seventh rectangular area of ​​70mm*25mm (e.g., ...). Figure 11Within the rectangular area (within the right dashed frame in the image), the sixth rectangular area is located between the third circular area, the fourth circular area, and the partition 860; the seventh rectangular area is located between the fifth circular area, the sixth circular area, and the partition 860. The distance between the third and fourth circular areas in the third direction is 6mm; the distance between the fifth and sixth circular areas in the third direction is 6mm; the distance between the third and fifth circular areas and the outer wall of the second sidewall 820 is 10mm; the distance between the fourth and sixth circular areas and the outer wall of the first sidewall 810 is 10mm; the distance between the outer wall of the outer shell 800 on the side closest to the third and fourth circular areas in the second direction and the third and fourth circular areas is 3mm; the distance between the third and fourth circular areas and the sixth rectangular area in the second direction is 2mm; the distance between the sixth rectangular area and the partition 860 in the second direction is 2mm; the thickness of the partition 860 is 1mm; the distance between the fifth and sixth circular areas and the seventh rectangular area in the second direction is 2mm; and the distance between the seventh rectangular area and the partition 860 in the second direction is 2mm. The distance between the sixth rectangular area and the outer wall of the first sidewall 810 and the outer wall of the second sidewall 820 in the third direction is 16mm. The distance between the seventh rectangular area and the outer wall of the first sidewall 810 and the outer wall of the second sidewall 820 in the third direction is also 16mm. The outer shell 800 reserves 9mm on the side of the fifth and sixth circular areas in the second direction for setting the communication interface 850 and the side wall of the outer shell 800.

[0319] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0320] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0321] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0322] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0323] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0324] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A magnetic tape (100), characterized in that, It includes a substrate layer (110), a front magnetic layer (120), and a back magnetic layer (130); The front magnetic layer (120) and the back magnetic layer (130) are located on opposite sides of the thickness direction of the substrate layer (110); Both the front magnetic layer (120) and the back magnetic layer (130) are used for recording data.

2. The magnetic tape (100) according to claim 1, characterized in that, The front magnetic layer (120) includes a front data track (1211), and the back magnetic layer (130) includes a back data track (1311). Both the front data track (1211) and the back data track (1311) are used to record data. The length of the front data track (1211) is equal to the length of the back data track (1311).

3. The magnetic tape (100) according to claim 1 or 2, characterized in that, The number of front data tracks (1211) of the front magnetic layer (120) is equal to the number of back data tracks (1311) of the back magnetic layer (130).

4. The magnetic tape (100) according to any one of claims 1-3, characterized in that, The width of the front data track (1211) of the front magnetic layer (120) is equal to the width of the back data track (1311) of the back magnetic layer (130).

5. The magnetic tape (100) according to any one of claims 1-4, characterized in that, The front magnetic layer (120) includes a front data band (121), and the front data band (121) includes multiple front data tracks (1211); The reverse magnetic layer (130) includes a reverse data band (131), and the reverse data band (131) includes multiple reverse data tracks (1311); The number of the front data tracks (1211) of the front data band (121) is equal to the number of the back data tracks (1311) of the back data band (131).

6. The magnetic tape (100) according to any one of claims 1-5, characterized in that, The front data track (1211) of the front magnetic layer (120) and the back data track (1311) of the back magnetic layer (130) are arranged symmetrically with respect to the substrate layer (110).

7. The magnetic tape (100) according to any one of claims 1-6, characterized in that, The front magnetic layer (120) includes a front servo band (122), and the back magnetic layer (130) includes a back servo band (132).

8. The magnetic tape (100) according to claim 7, characterized in that, The front servo band (122) and the back servo band (132) are arranged symmetrically with respect to the substrate layer (110).

9. The magnetic tape (100) according to any one of claims 1-8, characterized in that, The width of the front data track (1211) of the front magnetic layer (120) is less than or equal to 400 nm; The width of the reverse data track (1311) of the reverse magnetic layer (130) is less than or equal to 400 nm.

10. The magnetic tape (100) according to any one of claims 1-9, characterized in that, The front data band (121) of the front magnetic layer (120) includes a front data track (1211), and the back data band (131) of the back magnetic layer (130) includes b back data tracks (1311). Where a is an integer greater than or equal to 7000, and b is an integer greater than or equal to 7000.

11. The magnetic tape (100) according to any one of claims 1-10, characterized in that, The front magnetic layer (120) includes c front data bands (121), and the back magnetic layer (130) includes d back data bands (131). Where c is an integer greater than 4, and d is an integer greater than 4.

12. A magnetic tape device, characterized in that, Includes a reel (400) and a magnetic tape (100) as claimed in any one of claims 1-11, the magnetic tape (100) being wound on the reel (400).

13. A magnetic tape drive device, characterized in that, It includes a first magnetic head (300a), a second magnetic head (300b), and a first magnetic tape support mechanism (200a); The first magnetic tape support mechanism (200a) is used to support the first magnetic tape (100a), wherein the first magnetic tape (100a) includes a first substrate layer, a first front magnetic layer and a first back magnetic layer, the first front magnetic layer and the first back magnetic layer are respectively located on both sides of the thickness direction of the first substrate layer, and both the first front magnetic layer and the first back magnetic layer are used to record data. The first magnetic head (300a) and the second magnetic head (300b) are respectively located on both sides of the thickness direction of the first magnetic tape (100a) supported by the first magnetic tape support mechanism (200a). The first magnetic head (300a) is used to face the first front magnetic layer and to read or write data to the first front magnetic layer. The second magnetic head (300b) is used to face the first back magnetic layer and to read or write data to the first back magnetic layer.

14. The magnetic tape drive device according to claim 13, characterized in that, The first magnetic head (300a) includes a first front servo reader, and the second magnetic head (300b) includes a first back servo reader.

15. The magnetic tape drive device according to claim 13 or 14, characterized in that, The first magnetic head (300a) includes a first front data reader and a first front data writer, and the second magnetic head (300b) includes a first back data reader and a first back data writer; The number of the first front data readers of the first magnetic head (300a) is the same as the number of the first back data readers of the second magnetic head (300b), and the number of the first front data writers of the first magnetic head (300a) is the same as the number of the first back data writers of the second magnetic head (300b).

16. The magnetic tape drive device according to any one of claims 13-15, characterized in that, The size of the first front data reader of the first magnetic head (300a) in the first direction is the same as the size of the first back data reader of the second magnetic head (300b) in the first direction; The size of the first front data writer of the first magnetic head (300a) in the first direction is the same as the size of the first back data writer of the second magnetic head (300b) in the first direction; Wherein, the first direction is the width direction of the first magnetic tape (100a) supported by the first magnetic tape support mechanism (200a).

17. The magnetic tape drive device according to any one of claims 13-16, characterized in that, The size of the first front data writer of the first magnetic head (300a) in the first direction is less than or equal to 1.1 μm, and the size of the first front data reader of the first magnetic head (300a) in the first direction is less than or equal to 220 nm; The size of the first reverse data writer of the second magnetic head (300b) in the first direction is less than or equal to 1.1 μm, and the size of the first reverse data reader of the second magnetic head (300b) in the first direction is less than or equal to 220 nm.

18. The magnetic tape drive device according to any one of claims 13-17, characterized in that, The first magnetic tape support mechanism (200a) includes a first front support member (210), a second front support member (220), a first back support member (230), and a second back support member (240); The first front support member (210), the second front support member (220) and the first magnetic head (300a) are located on the side facing the front of the first magnetic tape (100a) supported by the first magnetic tape support mechanism (200a). The first front support member (210) and the second front support member (220) are used to support the front of the first magnetic tape (100a), and the first magnetic head (300a) is located between the first front support member (210) and the second front support member (220). The first reverse support member (230), the second reverse support member (240), and the second magnetic head (300b) are located on the side of the first magnetic tape (100a) supported by the first magnetic tape support mechanism (200a) with the reverse side facing it. The first reverse support member (230) and the second reverse support member (240) are used to support the reverse side of the first magnetic tape (100a), and the second magnetic head (300b) is located between the first reverse support member (230) and the second reverse support member (240).

19. The magnetic tape drive device according to any one of claims 13-18, characterized in that, It also includes the outer casing (800); The first magnetic head (300a), the second magnetic head (300b), and the first magnetic tape support mechanism (200a) are all disposed within the housing (800); The outer casing (800) has a first region (830) and a second region (840); The first region (830) is used to accommodate the first reel (400a), and the second region (840) is used to accommodate the second reel (400b). The first magnetic tape (100a) is wound on the first reel (400a) and the second reel (400b). The first region (830) and the second region (840) are arranged in a straight line along the second direction; The housing (800) includes a first sidewall (810) located on a third-direction side of the housing (800), a first magnetic head (300a) located between the first region (830) and the first sidewall (810), and a second magnetic head (300b) located between the second region (840) and the first sidewall (810). Wherein, the second direction and the third direction are both perpendicular to the width direction of the first magnetic tape (100a) supported by the first magnetic tape support mechanism (200a), and the second direction is perpendicular to the third direction.

20. The magnetic tape drive device according to any one of claims 13-18, characterized in that, It also includes the outer casing (800); The first magnetic head (300a), the second magnetic head (300b), and the first magnetic tape support mechanism (200a) are all disposed within the housing (800); The outer casing (800) has a first region (830) and a second region (840); The first region (830) is used to accommodate the first reel (400a), and the second region (840) is used to accommodate the second reel (400b). The first magnetic tape (100a) is wound on the first reel (400a) and the second reel (400b). The first region (830) and the second region (840) are staggered in both the second direction and the third direction; The housing (800) includes a first sidewall (810) and a second sidewall (820), the first sidewall (810) and the second sidewall (820) being located on opposite sides of the housing (800) in the third direction. The distance between the first region (830) and the first sidewall (810) is greater than the distance between the second region (840) and the first sidewall (810), and the distance between the first region (830) and the second sidewall (820) is less than the distance between the second region (840) and the second sidewall (820). The first magnetic head (300a) is located between the first region (830) and the first sidewall (810), and the second magnetic head (300b) is located between the second region (840) and the second sidewall (820).

21. The magnetic tape drive device according to any one of claims 13-20, characterized in that, It also includes a head drive assembly (600); The first magnetic head (300a) and the second magnetic head (300b) are connected to the same magnetic head drive assembly (600).

22. The magnetic tape drive device according to any one of claims 13-20, characterized in that, It also includes a first head drive assembly (600a) and a second head drive assembly (600b); The first magnetic head (300a) is connected to the first magnetic head drive assembly (600a), and the second magnetic head (300b) is connected to the second magnetic head drive assembly (600b).

23. The magnetic tape drive device according to any one of claims 13-20, characterized in that, It also includes a third magnetic head (300c), a fourth magnetic head (300d), and a second magnetic tape support mechanism (200b); The second magnetic tape support mechanism (200b) is used to support the second magnetic tape (100b), wherein the second magnetic tape (100b) includes a second substrate layer, a second front magnetic layer and a second back magnetic layer, the second front magnetic layer and the second back magnetic layer are respectively located on both sides of the thickness direction of the second substrate layer, and both the second front magnetic layer and the second back magnetic layer are used to record data. The third magnetic head (300c) and the fourth magnetic head (300d) are respectively located on both sides of the second magnetic tape (100b) supported by the second magnetic tape support mechanism (200b) in the thickness direction. The third magnetic head (300c) is used to face the second front magnetic layer and to read or write data to the second front magnetic layer. The fourth magnetic head (300d) is used to face the second back magnetic layer and to read or write data to the second back magnetic layer.

24. The magnetic tape drive device according to claim 23, characterized in that, It also includes a head drive assembly (600); The first magnetic head (300a), the second magnetic head (300b), the third magnetic head (300c), and the fourth magnetic head (300d) are connected to the same magnetic head drive assembly (600).

25. The magnetic tape drive device according to claim 23, characterized in that, It also includes a first head drive assembly (600a) and a third head drive assembly (600c); The first magnetic head (300a) and the second magnetic head (300b) are connected to the first magnetic head drive assembly (600a), and the third magnetic head (300c) and the fourth magnetic head (300d) are connected to the third magnetic head drive assembly (600c).

26. The magnetic tape drive device according to claim 23, characterized in that, It also includes a first head drive assembly (600a), a second head drive assembly (600b), a third head drive assembly (600c), and a fourth head drive assembly (600d); The first magnetic head (300a) is connected to the first magnetic head drive assembly (600a), the second magnetic head (300b) is connected to the second magnetic head drive assembly (600b), the third magnetic head (300c) is connected to the third magnetic head drive assembly (600c), and the fourth magnetic head (300d) is connected to the fourth magnetic head drive assembly (600d).

27. A magnetic tape storage device (10), characterized in that, Includes a first magnetic tape (100a) and a magnetic tape drive as described in any one of claims 13-26; The first magnetic tape support mechanism (200a) of the magnetic tape drive device supports the first magnetic tape (100a). The first magnetic head (300a) and the second magnetic head (300b) of the magnetic tape drive device are respectively located on both sides of the thickness direction of the first magnetic tape (100a). The first magnetic head (300a) faces the first front magnetic layer of the first magnetic tape (100a) and is used to read or write data on the first front magnetic layer. The second magnetic head (300b) faces the first back magnetic layer of the first magnetic tape (100a) and is used to read or write data on the first back magnetic layer.

28. The magnetic tape storage device (10) according to claim 27, characterized in that, It also includes a second magnetic tape (100b); The second magnetic tape support mechanism (200b) of the magnetic tape drive device supports the second magnetic tape (100b). The third magnetic head (300c) and the fourth magnetic head (300d) of the magnetic tape drive device are located on both sides of the thickness direction of the second magnetic tape (100b). The third magnetic head (300c) faces the second front magnetic layer of the second magnetic tape (100b) and is used to read or write data on the second front magnetic layer. The fourth magnetic head (300d) faces the second back magnetic layer of the second magnetic tape (100b) and is used to read or write data on the second back magnetic layer.

29. A data processing device (1), characterized in that, Includes a data processing device (20) and a magnetic tape storage device (10) as described in claim 27 or 28; The first magnetic head (300a) and the second magnetic head (300b) of the magnetic tape storage device (10) are both electrically connected to the data processing device (20).

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