749 results about "Magnetic tape" patented technology

A household vacuum sealer contains: a base, a lid, and a hot-melt sealing element. The base includes a receiving chamber for accommodating a control circuit and a vacuum pump. The base also includes a vacuuming chamber and an accommodation chamber. The hot-melt sealing element includes a holder, a mica slice, a laminated heating layer, the insulated composite layer, and a protective cap. The insulated composite layer includes multiple insulated tape layers. The laminated heating layer includes a high-temperature resistance tapes made of polyimide, a metal resistance tape, two electrical connection films, and two alternating current (AC) electrodes. The mica slice is parallelly fixed on a top of the holder. The laminated heating layer includes the two electrical connections. Furthermore, the protective cap is covered on the insulated composite layer and includes a hollowly elongated zone.

The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. The ferromagnetic powder is a hexagonal ferrite powder, tilt cos θ of the hexagonal ferrite powder with respect to a surface of the magnetic layer, which is acquired by cross-sectional observation performed using a scanning transmission electron microscope, is 0.85 or more and 1.00 or less, and standard deviation σ of the cos θ in a width direction of the surface of the magnetic layer is 0.03 or less.

The invention discloses an LDPC (Low Density Parity Check) coding and decoding system and method for high-density tape storage, and the system comprises a main controller which is used for scheduling coding and decoding mode switching and module cooperative control; the storage and calculation integrated array is used for executing zero-carrying storage calculation; the ping-pong buffer framework is composed of an input buffer module Buffer A and an output buffer module Buffer B; the dynamic code length extension module is used for reconstructing a cascade link; the preprocessing module is used for converting the noisy code word into a log likelihood ratio (LLR) value; the hard decision module is used for converting the VN message into user data; the main controller is connected with all the modules through a control bus, and the dynamic code length extension module controls the power state and interconnection topology of the sub-arrays. According to the LDPC coding and decoding system and method based on the storage and calculation integrated array, zero-carrying calculation is achieved, iterative decoding is accelerated through a ping-pong buffer architecture, and the code length is flexibly configured through the dynamic code length extension module, the coding and decoding efficiency of high-density tape storage is improved, delay and energy consumption are reduced, meanwhile, multi-code-length self-adaption is supported, and high performance and flexibility are considered.

Systems, methods, and instrumentalities are disclosed for retrieving information from tapes. The first group of read elements may be positioned adjacent to the first track and the second group of read element may be adjacent to the second track. In some embodiments, the system may include a second read sensor. Multiple readings of the electromagnetic fields generated by the first track may be collected using multiple read elements of the first group, A composite interpretation of a set of data encoded on the first track may be generated based on the multiple readings of the electromagnetic fields generated by the first track that are collected by the multiple read elements of the first group.

Described is a high-temperature superconductor (HTS) cable, comprising a plurality of HTS tapes, wherein all or part of a cross-section of at least one of the HTS tapes are removed to reduce the current carrying capacity of the HTS tape. Also described is a method for shaping the current density of a high-temperature superconductor (HTS) cable, wherein the HTS current density is carried by HTS tapes, and wherein the method comprises selective mechanical removal of all or part of the cross section of one or more of HTS tapes.

A main object of the present technology is to improve the reliability of a magnetic recording tape by controlling the distribution of the binder in the underlayer.The present technology provides a magnetic recording medium including a magnetic layer, an underlayer, and a base layer in this order, the underlayer containing a chlorine-containing binder, the underlayer including a part having a thickness of 130 nm or less, the part having a chlorine count equal to or more than a threshold described below:[T⁢hreshold]=[⁠an⁢ average⁢ chlorine⁢ count⁢ in⁢ the⁢ underlayer]+6×[a⁢ standard⁢ deviation⁢ determined⁢ in⁢ calculation⁢ of⁢ the⁢ average⁢ chlorine⁢ count].Furthermore, the present technology also provides a magnetic recording medium including a magnetic layer, an underlayer, and a base layer in this order, the underlayer containing a chlorine-containing binder, the underlayer including a part having a thickness of 12% or less of a thickness of the underlayer, the part having a chlorine count equal to or more than the above-described threshold.

A communications panel includes a chassis receiving one or more tray arrangements that each support one or more cassettes. Each cassette carries a plurality of ports at which connections are made between front and rear plug connectors. Each tray arrangement includes guides along which the cassettes slidably mount. The guides and cassettes are configured to enable cassettes of various size to mount to the same tray without reconfiguring the guides.

The invention provides a magnetic head, a magnetic tape unit and a magnetic tape storage rack, and belongs to the technical field of magnetic tape storage. The magnetic head comprises a plurality of read-write areas, the plurality of read-write areas are arranged in the height direction of the magnetic head, and intervals are formed among the plurality of read-write areas; each of the plurality of read-write areas comprises a write head area and a read head area which are arranged along the width direction of the magnetic head, the write head area comprises a write head for writing data into the magnetic tape, and the read head area comprises a read head for reading data from the magnetic tape; and when data access needs to be carried out on a target data band of the tape, carrying out data access on the target data band through the read-write area closest to the target data band. According to the magnetic head, the thickness of the magnetic tape units can be reduced, more magnetic tape units are arranged in the rack, and the magnetic tape storage density of the rack is improved. The magnetic head can also save materials for manufacturing the magnetic head and reduce the manufacturing cost of the magnetic head.

A method, in accordance with one aspect, includes writing, by a tape drive, data tracks to a data band of a magnetic tape having servo bands flanking the data band, the writing being performed using a magnetic head that is not designed for a format of the magnetic tape. The writing includes overwriting a portion of each of the servo bands with the data tracks. A method, in accordance with another aspect, includes writing data tracks to a data band using a magnetic head that is not designed for a format of the magnetic tape. An effective pitch of servo readers of the magnetic head used simultaneously during the writing matches a servo reader pitch specification of the format of the magnetic tape. An average effective pitch of write transducers of the magnetic head is greater than a data track pitch specification of the format of the magnetic tape.

A magnetic tape cartridge includes a magnetic tape and a case that is a housing of which a first case member and a second case member are fastened to each other to form an internal space in which a magnetic tape is accommodable, the case including a first fastening hole to which a first fastening member fastening the first case member and the second case member to each other is attached and a second fastening hole to which a second fastening member that is attached through a method different from a method through which the first fastening member is attached and that fastens the first case member and the second case member to each other for suppression of decomposition of the housing is attachable.

A method, in accordance with one aspect, includes writing, by a tape drive, data tracks to a data band of a magnetic tape having servo bands flanking the data band, the writing being performed using a magnetic head that is not designed for a format of the magnetic tape. The writing includes overwriting a portion of each of the servo bands with the data tracks. A method, in accordance with another aspect, includes writing data tracks to a data band using a magnetic head that is not designed for a format of the magnetic tape. An effective pitch of servo readers of the magnetic head used simultaneously during the writing matches a servo reader pitch specification of the format of the magnetic tape. An average effective pitch of write transducers of the magnetic head is greater than a data track pitch specification of the format of the magnetic tape.

A plurality of servo patterns are recorded in a magnetic tape along a longitudinal direction. The servo pattern is at least one linear magnetization region pair. The linear magnetization region pair includes a first linear magnetization region, which is linearly magnetized, and a second linear magnetization region, which is linearly magnetized. The first linear magnetization region and the second linear magnetization region are inclined in opposite directions with respect to a first imaginary straight line along a width direction of the magnetic tape. The first linear magnetization region has a steeper inclined angle with respect to the first imaginary straight line than the second linear magnetization region.

A tape supply device that supplies a tape to an optical cable, the tape supply device includes: an accumulator unit of a multistage unit type divided into units, each of the units including a plurality of movable rollers and a plurality of fixed rollers, the units being connected in series; and a control unit configured to control a supply order of the tape from the units.

A first servo pattern has a first position and a second position which intersect an imaginary line. A second servo pattern has a third position intersecting the imaginary line. The imaginary line is set at a position at which a relationship in which a distance between the first position and the second position is half of a distance between the first position and the third position is established between the first servo pattern and the second servo pattern adjacent to each other in a longitudinal direction. A width of a servo band is set to a length in which a distance from the imaginary line to one end of the servo band in a width direction and a distance from the imaginary line to the other end of the servo band in the width direction are equal.

A head driving device includes an actuator assembly driving a head member in a width direction of tape. The head driving device includes a first end support beam, a second end support beam, a first skew driving piezoelectric unit, and a second skew driving piezoelectric unit. The first end support beam is arranged between a first end portion of the head member in a length direction and a base member. The second end support beam is arranged between a second end portion of the head member in the length direction and the base member. The first skew driving piezoelectric unit and the second skew driving piezoelectric unit drive the head member around the Z-axis.

To prevent degradation of service to users by analyzing reading errors of an absolute positioning system that detects absolute positions.SOLUTION: An elevator system includes an APS tape on which absolute position information is continuously set corresponding to the position of the car in the direction of movement within the elevator shaft, an APS sensor installed on the car and equipped with two cameras that read absolute position information corresponding to the car's position, and an information processing device that processes the absolute position information read by the APS sensor. The two cameras are positioned so that the reading positions of the absolute position information are separated by an offset distance in the direction of movement. The information processing device includes a recording processing unit that records error information including the error position when a reading error occurs in each of the two cameras, and a compilation processing unit that compiles compilation data that associates the error position with the number of errors based on the recorded error information.SELECTED DRAWING: Figure 8

The embodiment of the invention discloses a magnetic separation chip for cell separation and a preparation method thereof.The magnetic separation chip structurally comprises a sample layer, a functional layer, a clamp set and a magnetic field source, the sample layer is composed of a flow channel layer and a sealing film, and the flow channel layer is provided with a sheath fluid inlet, a sample inlet and a sample outlet; the sealing film is attached to the open surface of the runner layer to seal the runner; the functional layer is located below the sample layer and comprises a patterned substrate and an amorphous alloy soft magnetic strip material, the patterned substrate is provided with a counter bore groove, the amorphous alloy soft magnetic strip material is embedded into the counter bore groove, and the upper surface of the amorphous alloy soft magnetic strip material is flush with the upper surface of the substrate, right faces the sealing film and is arranged in the extending direction of the flow channel; the clamp group comprises an upper clamping plate and a lower clamping plate, the upper clamping plate is arranged above the sample layer, the lower clamping plate is arranged below the functional layer, the upper clamping plate is provided with runner holes corresponding to the inlets and the outlets, and the two are connected through bolts to clamp and fix the sample layer and the functional layer; the magnetic field source is arranged at the end where the sample outlet is located and on one side opposite to the functional layer, so that a gradient magnetic field which is gradually enhanced from the inlet to the outlet is formed in the flow channel.

A servo pattern recording head includes: a plurality of head cores that are magnetically separated from each other; and a plurality of gap patterns that are formed on a front surface of each of the plurality of head cores and that are used for recording a plurality of servo patterns in a width direction of a magnetic tape by applying a magnetic field to the magnetic tape in response to a pulse current, in which the plurality of gap patterns are formed on the front surface along a direction corresponding to the width direction, and the plurality of gap patterns deviate from each other at a predetermined interval in a direction corresponding to a longitudinal direction of the magnetic tape between the gap patterns adjacent to each other along the direction corresponding to the width direction.

The utility model discloses fan dispensing inspection and magnetic ring assembly equipment which comprises a control module and a lower rack, the pushing mechanism, the dispensing mechanism, the visual camera inspection mechanism, the module carrying mechanism, the grabbing and moving mechanism, the tape clip automatic push-out mechanism, the automatic tape winding mechanism, the tape assembling and pressing mechanism, the discharging mechanism and the control module are in circuit connection with the control module. The visual camera inspection mechanism is used for detecting the dispensing condition and feeding back the dispensing condition to the control module, so that the production efficiency is greatly improved and the reject ratio is reduced; the equipment adopts an automatic assembly operation mode, so that the assembly precision is greatly improved, the dynamic balance is very stable, the noise of the cooling fan in the rotating process is reduced, and the service life is also greatly prolonged; by replacing the positioning carriers of the products, the products of various specifications can be compatible at the same time, and the products are convenient and fast to replace and produce; the labor is reduced, the yield is increased, and the product quality is improved.

The invention provides a tape material applicator and computer program capable of applying relatively short tape materials and reducing the difficulty in tape application. The tape material applicator unit 60, mounted on the sixth axis of a robot, includes a disc-shaped member 50 and a roller swing mechanism 80. The tape material clamping device 200, attached to the disc-shaped member 50, clamps one end 304 of the tape material 300, while the guide 100, attached to the roller swing mechanism 80, holds the other end 305 of the tape material 300. The roller 90 presses the tape material 300 onto the workpiece 40. The tape material 300 is applied from one end 304 to the other end 305 along the application path by pressing with the roller 90, while maintaining the unattached part of the tape material 300 elevated from the workpiece 40.

The embodiment of the invention provides a storage system, a data storage method and a storage device, the storage device in the storage system comprises a tape reel, and the deployment cost of the storage system can be reduced. A storage system includes a source storage device to store production data; the backup storage device is used for storing copy data of the production data; wherein the backup storage device comprises a tape reel, the tape reel comprises a plurality of continuous physical storage spaces, any physical storage space in the plurality of continuous physical storage spaces comprises a first space and a second space, the first space is used for storing the copy data, and the second space is a reserved space OP.

Systems and methods are disclosed for retrieving information from legacy storage media with high fidelity and minimal contact. A read sensor with multiple read elements detects electromagnetic fields from tracks on a storage medium. Readings from different elements are combined to generate a composite interpretation, which can be used to, for example, generate digitized waveforms and determine if portions of tracks are damaged.

The embodiment of the invention provides a magnetic tape, a driver, a magnetic tape system and electronic equipment, and aims to avoid failure of the whole magnetic tape system due to breakage of the magnetic tape in the magnetic tape system. The magnetic tape system comprises a magnetic tape, a read-write magnetic head, a page extractor and a controller, the magnetic tape comprises a plurality of storage pages which are arranged in a stacked mode, and in the read-write process of the magnetic tape, the controller can determine at least one target storage page from the storage pages. And then the controller can control the page fetcher to fetch the target storage page and control the read-write magnetic head to read data in the target storage page or write the data into the target storage page. The data is stored in the multiple storage pages, in the working process, the page taking device makes contact with the target storage page so as to take out the target storage page, compared with the mode that a magnetic tape is wound on a reel, the stress of the storage pages is small, and therefore the situation that the magnetic tape in a magnetic tape system breaks, and consequently the whole magnetic tape system fails is avoided.

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which the number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.25 μm or more and 0.55 μm or less is 10 or more and 500 or less per an area of 40 μm×40 μm, and standard deviation a of the number of the recesses in a width direction of the surface of the magnetic layer is 50 or less.

A tape light carrier system includes an elongate structure having a tape light receiving recess along its length. An inner and outer set of slots are arranged on inner sides of the tape light receiving recess. An inner covering lens is engaged with the inner set of slots and an outer covering lens is engaged with the outer set of slots. A flexible linear light source is affixed to the bottom of the tape light receiving recess using an adhesive. The inner covering lens is arranged in an arc and holds the flexible linear light source in position along the bottom of the tape light receiving recess. A T-slot may be arranged along the underside of the elongate structure, and barn door type shutters may be arranged along the sides of the tape light carrier.

The magnetic head comprises a recording module in which a plurality of recording elements are provided, and a reproducing module in which a plurality of reproducing elements are provided. The recording module and the reproducing module are disposed along a longitudinal direction of the magnetic tape. A pair of first servo reading elements of the recording module and a pair of second servo reading elements of the reproducing module are shifted from each other by a predetermined difference along one direction in the width direction of the magnetic tape. The predetermined difference is defined based on a pitch between a plurality of tracks formed using an SMR method and a length of the recording element in the width direction of the magnetic tape.

Provided are a method, system, and computer program product in which operations are performed for generating a logical recovery cache partition to perform testing and to recover exported data, wherein production data is separated from recovered data. Concurrent recovery of exported physical tape data is performed by the method, system, and computer program product.

Provided is a magnetic tape having a non-magnetic support and a magnetic layer containing a ferromagnetic powder, wherein the protrusion height Spk defined in ISO 25178 is 1.2 to 2.8 nm inclusive, said protrusion height Spk being measured in a measurement region of 5 × 5 μm on the surface of the magnetic layer after 500 cycles of back and forth sliding with respect to an LTO8 head at a head inclination angle of 15° at a temperature of 15°C and a relative humidity of 80%.

Provided is a magnetic tape apparatus. In a case where a maximum value of an absolute value of a difference between a servo band interval obtained before the following storage and a servo band interval obtained after the storage of N cycles, in which a predetermined storage is set as one cycle, is denoted by A, and a medium life is equal to or longer than 5 years, which is calculated by a linear function of A and a logarithm loge T of T derived from a value of A and a value of the logarithm loge T of a total storage time T of the storage of the N cycles, each of which is obtained by setting N as 1, 2, 3, 4, or 5. The medium life is T, in a case where A satisfies Expression a: A=1.5−B+C.

The invention discloses storage equipment and a storage system, and relates to the technical field of magnetic tapes. The magnetic tape in the magnetic tape medium memory is accessed by the magnetic head driver in the magnetic tape medium memory, and the magnetic head driver in the magnetic tape medium memory is not used for accessing the magnetic head drivers in other magnetic tape medium memories, namely, the shared part in the storage equipment does not comprise the mechanical structure of the magnetic head driver. The problem that the storage device breaks down due to unreliable mechanical parts is reduced, and the service stability in the storage device is improved. The data processing assembly is connected with different tape medium memories through a plurality of data channels, and the plurality of tape medium memories share the data processing assembly, that is, shared parts in the storage equipment do not comprise mechanical parts, and the mechanical parts of the magnetic head driver do not need to be moved for multiple times, so that the reliability of the mechanical parts in the storage equipment is improved, and the reliability of the storage equipment is improved. And the service stability in the storage equipment can be further improved.