Magnetic recording device and magnetic recording system
The magnetic recording device stabilizes recording operations by employing a central heat-assisted medium flanked by other methods and a control unit for data management, addressing lifespan and density challenges in magnetic recording devices.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KK TOSHIBA
- Filing Date
- 2023-01-16
- Publication Date
- 2026-05-20
AI Technical Summary
Existing magnetic recording devices face challenges in achieving stable recording operations due to changes in recording characteristics and reduced lifespan of magnetic heads, particularly in high-density recording methods.
The magnetic recording device employs a configuration with distinct magnetic recording media and heads using different recording methods, with a central magnetic recording medium using heat-assisted recording and flanking media using other methods, and a control unit to manage data swapping and recording operations based on access frequency and available space.
This configuration enables stable and high-density recording operations by minimizing vibration and maintaining recording characteristics, extending the lifespan of magnetic heads, and optimizing data management through controlled data swapping.
Smart Images
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Abstract
Description
Technical Field
[0001] Embodiments of the present invention relate to a magnetic recording device and a magnetic recording system.
Background Art
[0002] Information is recorded on a magnetic recording medium such as an HDD (Hard Disk Drive) using a magnetic head. In a magnetic recording device, a stable recording operation is desired.
Prior Art Documents
Patent Documents
[0003] <(
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] Embodiments of the present invention provide a magnetic recording device and a magnetic recording system capable of a stable recording operation.
Means for Solving the Problems
[0005] According to the embodiment, the magnetic recording device includes a group of magnetic recording media and a group of magnetic heads. The group of magnetic recording media includes a first magnetic recording media, a plurality of second magnetic recording media, and a plurality of third magnetic recording media. The group of magnetic heads includes a first magnetic head, a plurality of second magnetic heads, and a plurality of third magnetic heads. The first magnetic head is capable of recording data on the first magnetic recording media in a first method. One of the plurality of second magnetic heads is capable of recording data on one of the plurality of second magnetic recording media in a second method different from the first method. One of the plurality of third magnetic heads is capable of recording data on one of the plurality of third magnetic recording media in a second method. The first magnetic recording media is provided between the plurality of second magnetic recording media and the plurality of third magnetic recording media in a first direction. The other magnetic recording media on which data is recorded in the first method do not overlap with the group of magnetic recording media in the first direction. [Brief explanation of the drawing]
[0006] [Figure 1] Figure 1 is a schematic cross-sectional view illustrating a magnetic recording device according to the first embodiment. [Figure 2] Figure 2 is a flowchart illustrating the operation of the magnetic recording device according to the first embodiment. [Figure 3] Figure 3 is a flowchart illustrating the operation of the magnetic recording device according to the first embodiment. [Figure 4] Figure 4 is a schematic cross-sectional view illustrating a magnetic recording device according to the first embodiment. [Figure 5] Figure 5 is a schematic perspective view illustrating a magnetic recording device according to an embodiment. [Figure 6] Figure 6 is a schematic perspective view illustrating a part of the magnetic recording apparatus according to the embodiment. [Modes for carrying out the invention]
[0007] (First Embodiment) Figure 1 is a schematic cross-sectional view illustrating a magnetic recording device according to the first embodiment. As shown in Figure 1, the magnetic recording device 150 according to this embodiment includes a group of magnetic recording media 20 and a group of magnetic heads 30.
[0008] The magnetic recording medium group 20 includes a first magnetic recording medium 21, a plurality of second magnetic recording mediums 22, and a plurality of third magnetic recording mediums 23. The number of first magnetic recording mediums 21 may be one or more.
[0009] The first magnetic recording medium 21 is provided between a plurality of second magnetic recording mediums 22 and a plurality of third magnetic recording mediums 23 in a first direction D1. The first direction D1 is defined as the Z-axis direction. One direction perpendicular to the Z-axis direction is defined as the X-axis direction. The direction perpendicular to both the Z-axis direction and the X-axis direction is defined as the Y-axis direction.
[0010] Magnetic recording media are layered, extending along the XY plane. Magnetic recording media are disk-shaped.
[0011] A magnetic recording medium is a recording layer. For example, one magnetic recording medium may be provided on the first surface of a substrate, and another magnetic recording medium may be provided on the second surface of the substrate. The configuration (material and crystal structure, etc.) of the first magnetic recording medium 21 may differ from the configurations of the multiple second magnetic recording mediums 22 and may differ from the configurations of the multiple third magnetic recording mediums 23. The configuration (material and crystal structure, etc.) of the substrate on which the first magnetic recording medium 21 is provided may differ from the configuration of the substrate on which the multiple second magnetic recording mediums 22 are provided and may differ from the configuration of the substrate on which the multiple third magnetic recording mediums 23 are provided.
[0012] The magnetic head group 30 includes a first magnetic head 31, a plurality of second magnetic heads 32, and a plurality of third magnetic heads 33. The first magnetic head 31, the plurality of second magnetic heads 32, and the plurality of third magnetic heads 33 may overlap, for example, along a first direction D1.
[0013] For example, a base 38 is provided with multiple arms 155. The multiple arms 155 are arranged, for example, along a first direction D1. For example, a suspension assembly 35 is fixed to each of the multiple arms 155. The suspension assembly 35 is, for example, a head gimbal assembly. Each of the multiple magnetic heads is fixed to one of the multiple suspension assemblies 35. One of the multiple magnetic heads faces one of the multiple magnetic recording media (recording layers).
[0014] The first magnetic head 31 can record data on the first magnetic recording medium 21 in the first method. One of the multiple second magnetic heads 32 can record data on one of the multiple second magnetic recording mediums 22 in the second method. The second method is different from the first method. One of the multiple third magnetic heads 33 can record data on one of the multiple third magnetic recording mediums 23 in the second method.
[0015] The first method includes, for example, heat-assisted magnetic recording. The second method includes methods other than heat-assisted magnetic recording. For example, the second method includes any of the following methods: magnetization-controlled assisted magnetic recording, current-assisted magnetic recording, and high-frequency assisted magnetic recording.
[0016] In heat-assisted magnetic recording, a portion of the magnetic recording medium is locally heated. Data is efficiently recorded in the heated area. In magnetization-controlled magnetic recording, the magnetization of magnetic elements on the magnetic head is controlled to efficiently direct the recording magnetic field generated from the magnetic head towards the magnetic recording medium. In current-assisted magnetic recording, the responsiveness of the magnetic head is improved by passing an electric current through the main magnetic poles of the magnetic head. . high In frequency-assisted magnetic recording, a high-frequency magnetic field generated from a magnetic element on the magnetic head is locally applied to the magnetic recording medium. Data is efficiently recorded in the area where the high-frequency magnetic field is applied.
[0017] As described above, the first magnetic recording medium 21 to which the first method is applied is provided between a plurality of second magnetic recording media 22 to which the second method is applied and a plurality of third magnetic recording media 23 to which the second method is applied in the first direction D1. Other magnetic recording media on which data is recorded by the first method do not overlap with the magnetic recording medium group 20 in the first direction D1.
[0018] In the embodiment, the first magnetic recording medium 21 to which the first method is applied is provided at the central portion of the magnetic recording medium group 20 in the first direction D1. The central portion is sandwiched between a plurality of second magnetic recording media 22 to which the second method is applied and a plurality of third magnetic recording media 23. Thereby, a more stable recording operation can be obtained. According to the embodiment, a magnetic recording apparatus capable of a stable recording operation can be provided.
[0019] For example, in heat assisted magnetic recording, when the recording operation is repeated, the characteristics of the magnetic head are likely to change. The change in characteristics is considered to be due to the influence of heat. For example, the lifespan is short.
[0020] For example, in the first magnetic head 31, the second magnetic head 32, and the third magnetic head 33, the target recording characteristics are set. The number of recording times during which the target recording characteristics can be maintained corresponds to the lifespan. The lifespan of the first magnetic head 31 is shorter than the lifespan of one of the plurality of second magnetic heads 32. The lifespan of the first magnetic head 31 is shorter than the lifespan of one of the plurality of third magnetic heads 33.
[0021] For example, the number of recording times during which the target recording characteristics can be maintained in the first magnetic head 31 is defined as the first recording times. The number of recording times during which the target recording characteristics can be maintained in one of the plurality of second magnetic heads 32 is defined as the second recording times. The number of recording times during which the target recording characteristics can be maintained in one of the plurality of third magnetic heads 33 is defined as the third recording times. The first recording times is less than the second recording times. The first recording times is less than the third recording times.
[0022] On the other hand, for example, in magnetic recording by the first method, it is easier to obtain a higher recording density than in magnetic recording by the second method. For example, the first recording density in the first magnetic recording medium 21 is higher than the second recording density in the multiple second magnetic recording mediums 22. The first recording density is higher than the third recording density in the multiple third magnetic recording mediums 23. Thus, although a high recording density can be obtained in the first method, the recording characteristics tend to change as the number of recording operations increases.
[0023] In this embodiment, a first magnetic recording medium 21 corresponding to a first magnetic head 31 to which a first method, which is prone to changes in recording characteristics due to recording operation, is applied, is provided in the central part of the magnetic recording medium group 20. In the central part of the magnetic recording medium group 20, for example, vibrations are reduced. For example, the first vibration at the location of the first magnetic recording medium 21 (and the first magnetic head 31) is smaller than the second vibration at at least one of the locations of the plurality of second magnetic recording mediums 22 (and the plurality of second magnetic heads 32). The first vibration is smaller than the third vibration at at least one of the locations of the plurality of third magnetic recording mediums 23 (and the plurality of third magnetic heads 33). A higher recording density can be obtained in the first magnetic recording medium 21 where vibrations are suppressed.
[0024] As described above, it is preferable to set a low recording frequency for the first magnetic recording medium 21 to which the first method is applied. This ensures that a high recording density can be stably obtained in the first magnetic recording medium 21. For example, the first recording frequency for recording to the first magnetic recording medium 21 is lower than the second recording frequency for recording to the multiple second magnetic recording mediums 22. The first recording frequency is lower than the third recording frequency for recording to the multiple third magnetic recording mediums 23. Such control may be performed by a control unit 195 as illustrated in Figure 1. An example of the operation of the control unit 195 will be described later.
[0025] The magnetic recording medium group 20 may include a plurality of first magnetic recording media 21 (see Figure 1). The magnetic head group 30 may include a plurality of first magnetic heads 31. One of the plurality of first magnetic heads 31 is capable of recording data on one of the plurality of first magnetic recording media 21 in the first method. For example, other magnetic recording media on which data is recorded in the second method are not provided between the plurality of first magnetic recording media 21.
[0026] The absolute value of the difference between the number of multiple second magnetic recording media 22 and the number of multiple third magnetic recording media 23 is, for example, 2 or less. This ensures that the first magnetic recording media 21 to which the first method is applied is located in the central part of the group of magnetic recording media. The absolute value of the difference may also be 1. The absolute value of the difference may also be 0.
[0027] The magnetic recordings of the first and second methods may be combined with CMR (Conventional Magnetic Recording), SMR (Shingled Magnetic Recording), or IMR (interlaced magnetic recording). For example, the first method includes one of CMR, SMR, and IMR. The second method includes one of CMR, SMR, and IMR.
[0028] High recording density can be easily obtained with SMR and IMR. For example, the first method preferably includes SMR. Alternatively, the first method preferably includes IMR. On the other hand, the second method may include CMR.
[0029] The following describes an example of control of the recording operation by the control unit 195. The control unit 195 can control the magnetic recording medium group 20 and the magnetic head group 30.
[0030] Figure 2 is a flowchart illustrating the operation of the magnetic recording device according to the first embodiment. As shown in Figure 2, the control unit 195 can perform a first operation (step S110) and a second operation (step S120). In the first operation, the control unit 195 records recording data on the first magnetic recording medium 21. In the second operation, the control unit 195 records recording data on at least one of the plurality of second magnetic recording mediums 22 and the plurality of third magnetic recording mediums 23. The second operation is performed before the first operation.
[0031] As shown in Figure 2, once the second operation is performed, the control unit 195 detects the access frequency of the multiple second magnetic recording media 22 and the multiple third magnetic recording media 23 (step S121).
[0032] The control unit 195 compares the access frequency of the recorded data recorded on at least one of the plurality of second magnetic recording media 22 and plurality of third magnetic recording media 23 with a first value (step S122). The first value may be predetermined, for example. The first value may be stored in memory. If the access frequency is less than or equal to the first value, the control unit 195 performs a first operation (step S110).
[0033] If the access frequency is not less than or equal to the first value, the control unit 195 returns to the second operation (step S120) and continues processing.
[0034] In the first operation (step S110), the control unit records the recorded data recorded on at least one of the plurality of second magnetic recording media 22 and the plurality of third magnetic recording media 23 onto the first magnetic recording media 21. For example, a recording swap is performed.
[0035] When the frequency of access to recorded data is less than or equal to a first value, that recorded data is recorded on the first magnetic recording medium 21 at a high recording density. By swapping out the recorded data that is accessed infrequently, the recording areas of the second magnetic recording medium 22 and the third magnetic recording medium 23 can be used to record other data.
[0036] As shown in Figure 2, the control unit 195 may perform the third operation (step S130). In the third operation, the control unit 195 records other data in at least one of the plurality of second magnetic recording media 22 and plurality of third magnetic recording media 23 at the location where the swapped recording data was recorded.
[0037] According to the embodiment, appropriate recording operations can be performed in accordance with the characteristics of the first method and the second method, respectively. Recording operations with high recording density can be performed stably.
[0038] Figure 3 is a flowchart illustrating the operation of the magnetic recording device according to the first embodiment. Figure 3 illustrates another operation in the control unit 195. As shown in Figure 3, in this example as well, the control unit 195 records data on at least one of the multiple second magnetic recording media 22 and the multiple third magnetic recording media 23 in the second operation. The second operation is performed before the first operation.
[0039] As shown in Figure 3, the control unit 195 detects the remaining recording area of at least one of the multiple second magnetic recording media 22 and the multiple third magnetic recording media 23 (step S125).
[0040] The control unit 195 compares the remaining recording area of at least one of the plurality of second magnetic recording media 22 and plurality of third magnetic recording media 23 with a second value (step S126). The second value may be predetermined, for example. The second value may be stored in memory.
[0041] When the remaining recording area falls to a value of 2 or less, the control unit performs the first operation (step S110).
[0042] If the remaining recording area is not less than or equal to the second value, the control unit 195 returns to the second operation (step S120) and continues processing.
[0043] In this example as well, in the first operation (step S110), the control unit records the recorded data recorded on at least one of the plurality of second magnetic recording media 22 and plurality of third magnetic recording media 23 onto the first magnetic recording media 21. For example, a recording swap is performed.
[0044] As shown in Figure 3, the control unit 195 may be capable of performing the third operation (step S130). In the example in Figure 3, according to the embodiment, appropriate recording operations can be performed that are tailored to the characteristics of the first method and the second method. Recording operations with high recording density can be performed stably.
[0045] In the examples shown in Figures 2 and 3, the first operation may include updating the logical address of the recorded data, the physical address of the recorded data, and the correspondence between them.
[0046] Figure 4 is a schematic cross-sectional view illustrating a magnetic recording device according to the first embodiment. As shown in Figure 4, in the magnetic recording device 150A according to this embodiment, the number of first magnetic recording media 21 may be four or more. Even with the magnetic recording device 150A, a magnetic recording device capable of stable recording operation can be provided.
[0047] Figure 5 is a schematic perspective view illustrating a magnetic recording device according to an embodiment. As shown in Figure 5, the magnetic recording device 150 includes, for example, a housing 182. A group of magnetic recording media 20 and a group of magnetic heads 30 are provided inside the housing 182.
[0048] In the magnetic recording device 150 according to this embodiment, a rotary actuator is used. The magnetic recording medium group 20 consists of a plurality of recording medium disks. The plurality of recording medium disks are mounted on a spindle motor 180M. The plurality of recording medium disks are rotated in the direction of arrow AR by the spindle motor 180M. The spindle motor 180M responds to a control signal from the drive unit control unit. The magnetic recording device 150 may also include a recording medium 181. The recording medium 181 is, for example, an SSD (Solid State Drive). For example, non-volatile memory such as flash memory is used for the recording medium 181. For example, the magnetic recording device 150 may also be a hybrid HDD (Hard Disk Drive).
[0049] A head slider 159 is provided at the tip of the head stack assembly 160. A magnetic head included in the magnetic head group 30 is mounted on the head slider 159.
[0050] Figure 6 is a schematic perspective view illustrating a part of the magnetic recording apparatus according to the embodiment. As shown in Figure 6, the head gimbal assembly 158 has an arm 155 and a suspension 154 extending from the arm 155. A head slider 159 is provided at the tip of the suspension 154.
[0051] (Second Embodiment) The second embodiment relates to a magnetic recording system. The magnetic recording system includes the magnetic recording device (magnetic recording device 150 or magnetic recording device 150A) and the control unit 195. The control unit 195 may be provided separately from the magnetic recording device (magnetic recording device 150 or magnetic recording device 150A).
[0052] (Third embodiment) The third embodiment relates to a magnetic recording method. The magnetic recording method performs at least a part of the operation of the control unit 195 described above. A magnetic recording method that enables stable recording operation can be applied.
[0053] The embodiment may include the following configuration (e.g., proposed technical details). (Composition 1) First magnetic recording medium and Multiple second magnetic recording media, Multiple third magnetic recording media, A group of magnetic recording media including, First magnetic head and Multiple second magnetic heads, Multiple third magnetic heads, A group of magnetic heads including, Equipped with, The first magnetic head is capable of recording data on the first magnetic recording medium in the first method, One of the plurality of second magnetic heads is capable of recording data on one of the plurality of second magnetic recording media in a second method different from the first method. One of the plurality of third magnetic heads is capable of recording data on one of the plurality of third magnetic recording media in the second method. The first magnetic recording medium is provided in a first direction between the plurality of second magnetic recording mediums and the plurality of third magnetic recording mediums, A magnetic recording device in which data is recorded by the first method, wherein the other magnetic recording media do not overlap with the group of magnetic recording media in the first direction.
[0054] (Configuration 2) The group of magnetic recording media includes a plurality of the first magnetic recording media, The group of magnetic heads includes a plurality of the first magnetic heads, One of the plurality of first magnetic heads is capable of recording data on one of the plurality of first magnetic recording media in the first method, The magnetic recording apparatus according to configuration 1, wherein other magnetic recording media on which data is recorded by the second method are not provided between the plurality of first magnetic recording media.
[0055] (Composition 3) The magnetic recording apparatus according to configuration 1 or 2, wherein the absolute value of the difference between the number of the plurality of second magnetic recording media and the number of the plurality of third magnetic recording media is 2 or less.
[0056] (Composition 4) The first method is a magnetic recording apparatus according to any one of configurations 1 to 3, which includes heat-assisted magnetic recording.
[0057] (Composition 5) The magnetic recording apparatus according to configuration 4, wherein the second method includes any of the following methods: magnetization-controlled magnetic recording, current-assisted magnetic recording, and high-frequency-assisted magnetic recording.
[0058] (Composition 6) The first method is a magnetic recording apparatus according to configuration 5, which includes SMR (Shingled Magnetic Recording).
[0059] (Composition 7) The second method is a magnetic recording apparatus according to configuration 6, which includes CMR (Conventional Magnetic Recording).
[0060] (Composition 8) The first method includes one of the following: CMR (Conventional Magnetic Recording), SMR (Shingled Magnetic Recording), and IMR (interlaced magnetic recording). The second method is a magnetic recording apparatus according to configuration 5, comprising one of the CMR, the SMR, and the IMR.
[0061] (Composition 9) The first vibration at the location of the first magnetic recording medium is smaller than the second vibration at at least one of the locations of the plurality of second magnetic recording media. The magnetic recording apparatus according to any one of configurations 1 to 8, wherein the first vibration is smaller than the third vibration at at least one of the locations of the plurality of third magnetic recording media.
[0062] (Composition 10) The first recording frequency for recording to the first magnetic recording medium is lower than the second recording frequency for recording to the plurality of second magnetic recording media. A magnetic recording device according to any one of configurations 1 to 9, wherein the first recording frequency is lower than the third recording frequency for recording to the plurality of third magnetic recording media.
[0063] (Composition 11) The first recording density in the first magnetic recording medium is higher than the second recording density in the plurality of second magnetic recording mediums. A magnetic recording apparatus according to any one of configurations 1 to 10, wherein the first recording density is higher than the third recording density in the plurality of third magnetic recording media.
[0064] (Composition 12) The number of first recordings in the first magnetic head that can maintain the desired recording characteristics is less than the number of second recordings in one of the plurality of second magnetic heads that can maintain the same recording characteristics. The magnetic recording apparatus according to any one of configurations 1 to 11, wherein the first number of recordings is less than the number of third recordings in one of the plurality of third magnetic heads that can maintain the recording characteristics.
[0065] (Composition 13) The system further comprises a control unit capable of controlling the group of magnetic recording media and the group of magnetic heads, The control unit is capable of performing the first operation, The magnetic recording apparatus according to any one of configurations 1 to 12, wherein the control unit, in the first operation, records the recording data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media onto the first magnetic recording media.
[0066] (Composition 14) The magnetic recording apparatus according to configuration 13, wherein the control unit can perform the first operation when the frequency of accessing the recorded data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media is less than or equal to a first value.
[0067] (Composition 15) The magnetic recording apparatus according to configuration 13, wherein the control unit can perform the first operation when the remaining recording area of at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media becomes less than or equal to the second value.
[0068] (Composition 16) The control unit is capable of performing a second operation before the first operation. The magnetic recording apparatus according to configuration 14 or 15, wherein the control unit records the recording data in at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media during the second operation.
[0069] (Composition 17) The magnetic recording device according to any one of configurations 14 to 16, wherein the first operation includes updating the correspondence between the logical address relating to the recorded data and the physical address relating to the recorded data.
[0070] (Composition 18) The control unit is capable of performing a third operation, The magnetic recording apparatus according to configuration 14 or 15, wherein the control unit, in the third operation, records other data at the position where the recording data was recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media.
[0071] (Composition 19) A magnetic recording device as described in any one of configurations 1 to 12, Control unit and Equipped with, The control unit is capable of controlling the group of magnetic recording media and the group of magnetic heads, The control unit is capable of performing the first operation, A magnetic recording system in which, in the first operation, the control unit records the recording data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media onto the first magnetic recording media.
[0072] (Composition 20) Control the magnetic recording device, The magnetic recording device is First magnetic recording medium and Multiple second magnetic recording media, Multiple third magnetic recording media, A group of magnetic recording media including, First magnetic head and Multiple second magnetic heads, Multiple third magnetic heads, A group of magnetic heads including, Equipped with, The first magnetic head is capable of recording data on the first magnetic recording medium in the first method, One of the plurality of second magnetic heads is capable of recording data on one of the plurality of second magnetic recording media in a second method different from the first method. One of the plurality of third magnetic heads is capable of recording data on one of the plurality of third magnetic recording media in the second method. The first magnetic recording medium is provided in a first direction between the plurality of second magnetic recording mediums and the plurality of third magnetic recording mediums, Other magnetic recording media on which data is recorded by the first method do not overlap with the group of magnetic recording media in the first direction. In the control described above, the first operation is performed, A control method for a magnetic recording device, wherein, in the first operation, recording data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media is recorded on the first magnetic recording media.
[0073] According to the embodiment, a magnetic recording device and a magnetic recording system capable of stable recording operation can be provided.
[0074] The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, the specific configuration of each element included in a magnetic recording device, such as a magnetic recording medium, a magnetic head, and a control unit, is included within the scope of the present invention as long as it can be implemented in the same way and similar effects can be obtained by appropriately selecting from the range known to those skilled in the art.
[0075] Combinations of two or more elements from any of the specific examples, to the extent technically feasible, are also included within the scope of the present invention, insofar as they encompass the gist of the invention.
[0076] Furthermore, all magnetic recording devices that can be implemented by those skilled in the art by appropriately modifying the design based on the magnetic recording device described above as an embodiment of the present invention also fall within the scope of the present invention, insofar as they encompass the gist of the present invention.
[0077] Furthermore, within the scope of the concept of the present invention, a person skilled in the art could conceive of various modifications and alterations, and it is understood that such modifications and alterations also fall within the scope of the present invention.
[0078] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]
[0079] 20: Magnetic recording medium group, 21-23: 1st-3rd magnetic recording medium, 30: Magnetic head group, 31-33: 1st-3rd magnetic head, 35: Suspension assembly, 38: Base, 150, 150A: Magnetic recording device, 154: Suspension, 155: Arm, 158: Head gimbal assembly, 159: Head slider, 160: Head stack assembly, 180M: Spindle motor, 181: Recording medium, 195: Control unit, AR: Arrow, D1: First direction
Claims
1. First magnetic recording medium and Multiple second magnetic recording media, Multiple third magnetic recording media, A group of magnetic recording media including, First magnetic head and Multiple second magnetic heads, Multiple third magnetic heads, A group of magnetic heads including, Equipped with, The first magnetic head is capable of recording data on the first magnetic recording medium in the first method, One of the plurality of second magnetic heads is capable of recording data on one of the plurality of second magnetic recording media in a second method different from the first method. One of the plurality of third magnetic heads is capable of recording data on one of the plurality of third magnetic recording media in the second method. The first magnetic recording medium is provided in a first direction between the plurality of second magnetic recording mediums and the plurality of third magnetic recording mediums, A magnetic recording device in which data is recorded by the first method and other magnetic recording media included in the group of magnetic recording media do not overlap with the group of magnetic recording media in the first direction.
2. The group of magnetic recording media includes a plurality of the first magnetic recording media, The group of magnetic heads includes a plurality of the first magnetic heads, One of the plurality of first magnetic heads is capable of recording data on one of the plurality of first magnetic recording media in the first method, The magnetic recording apparatus according to claim 1, wherein other magnetic recording media included in the group of magnetic recording media, on which data is recorded by the second method, are not provided between the plurality of first magnetic recording media.
3. The magnetic recording apparatus according to claim 1, wherein the absolute value of the difference between the number of the plurality of second magnetic recording media and the number of the plurality of third magnetic recording media is 2 or less.
4. The magnetic recording apparatus according to claim 1, wherein the first method includes heat-assisted magnetic recording.
5. The magnetic recording apparatus according to claim 4, wherein the second method includes any of the following methods: magnetization control-assisted magnetic recording, current-assisted magnetic recording, and high-frequency-assisted magnetic recording.
6. The system further comprises a control unit capable of controlling the group of magnetic recording media and the group of magnetic heads, The control unit is capable of performing the first operation, The magnetic recording apparatus according to any one of claims 1 to 5, wherein the control unit, in the first operation, records the recording data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media onto the first magnetic recording media.
7. The magnetic recording apparatus according to claim 6, wherein the control unit can perform the first operation when the frequency of accessing the recorded data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media is less than or equal to a first value.
8. The control unit is capable of performing a second operation before the first operation. The magnetic recording apparatus according to claim 7, wherein the control unit records the recording data in at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media during the second operation.
9. The control unit is capable of performing a third operation, The magnetic recording apparatus according to claim 7, wherein the control unit, in the third operation, records other data at the position where the recording data was recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media.
10. A magnetic recording device according to claim 1, Control unit and Equipped with, The control unit is capable of controlling the group of magnetic recording media and the group of magnetic heads, The control unit is capable of performing the first operation, A magnetic recording system in which, in the first operation, the control unit records the recording data recorded on at least one of the plurality of second magnetic recording media and the plurality of third magnetic recording media onto the first magnetic recording media.