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62results about "Recording/reproducing/erasing methods" patented technology
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Magnetic recording device
PendingUS20260065930A1Construction of head windingsHeads using thin filmsMagnetic polesCondensed matter physics
Owner:KK TOSHIBA +1
Magnetic recording device
PendingUS20260065928A1Heads using thin filmsRecord information storageMagnetic polesCondensed matter physics
Owner:KK TOSHIBA +1
Magnetic recording medium, positioning method and related device
PCT designated stageWO2026066032A1Disposition/mounting of recording headsManufacture head surfaceMechanical engineeringCondensed matter physics
Provided in the present application are a magnetic recording medium, a positioning method, and a related device. The magnetic recording medium comprises a servo band and a positioning band, wherein the servo band is used for indicating longitudinal position information; and the positioning band is used for indicating physical position information, whch is used for indicating the real physical position of the longitudinal position information in the magnetic recording medium. In the magnetic recording medium, in addition to the existing servo band, a positioning band for indicating physical position information is additionally provided. The physical position information can indicate the real physical position of a certain point, and thus the position information of the magnetic recording medium at the logical level and the position information of the magnetic recording medium at the physical level are interconnected, facilitating physical-level processing on the magnetic recording medium by a user.
Owner:HUAWEI TECH CO LTD
Beginning of wrap data set reading and writing for tape drives
PendingUS20260088047A1Disposition/mounting of recording headsRecord information storageData setMagnetic tape
Beginning of wrap (BOW) data set reading and writing for tape drives is provided. In response to reaching an end of wrap (EOW) while writing to tape, a tape directory (TD) is updated to include first data set information for a first data set written at the EOW of a first wrap. A second data set is written using normal write procedure from a BOW of a second wrap, the second wrap following the first wrap. The first data set information is overwritten with second data set information for the second data set written at BOW. When reading a BOW data set from tape, data set information is read from a TD. Based on determining whether the data set information corresponds to a BOW data set, a target Data Set ID and a target Tape Write Pass are set for reading the BOW data set.
Owner:INTERNATIONAL BUSINESS MACHINE CORPORATION
Magnetic disk device
ActiveUS12562192B2Record information storageRecording/reproducing/erasing methodsEngineeringProcessing element
According to one embodiment, a magnetic disk device includes a disk, a write head, a write processing unit, an error correction unit, a correction limit prediction unit, and a determination unit. During a write period in which the write processing is executed on the second data track, the correction limit prediction unit is capable of determining whether or not data of each of the target sectors of the first data track is damaged, and generates prediction information, and the determination unit determines whether or not to cause the write processing unit to continue the write processing on the second data track based on the prediction information.
Owner:KK TOSHIBA +1
Tapered optical and magnetic elements for improved writing in heat-assisted magnetic recording
PendingJP2026103865AHeads using thin filmsOptical beam guiding meansHeat-assisted magnetic recordingHeat sink
The purpose of this disclosure is to provide a heat-assisted magnetic recording (HAMR) writer head with high magnetic field reliability and high accuracy. [Solution] Disclosed are a writer head for a heat-assisted magnetic recording device and a method for manufacturing a writer head. The writer head comprises a plurality of layers, including a waveguide cutoff layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. Each layer has a tapered angle near the air bearing surface. The writer head further has a principal axis pole adjacent to an optical component having a similar tapered angle near the air bearing surface.
Owner:HEADWAY TECHNOLOGIES INC
Magnetic recording medium and magnetic storage device
To provide a method for producing a magnetic recording medium capable of having a magnetic layer with high crystal orientation and few defects, a magnetic recording medium, and a magnetic storage device.SOLUTION: A method of producing a magnetic recording medium 1 includes: a step of forming a magnesium oxide underlayer 20 on a surface of a substrate 10 by a sputtering method with using a target containing magnesium oxide; and a step of forming a magnetic layer 30 on the surface side of the magnesium oxide underlayer 20, in which the target containing the magnesium oxide is heated to more than 600°C when forming the magnesium oxide underlayer 20.SELECTED DRAWING: Figure 1
Owner:RESONAC HARD DISK CORP +1
DATA STORAGE DEVICE WITH SUPPORTING BURSTS IN SERVO SECTORS
PendingDE102025126503A1Alignment for track following on tapesRecord information storageComputer hardwareBurst transmission
Various illustrative appearances relate to a data storage device, a method, and one or more processing devices configured to: open a servo gate in the selected head during a read operation to read the first servo bursts, the sync mark, and the second servo bursts in one of the servo sectors; and determine a position error signal for the selected head based on reading the first servo bursts and the second servo bursts.
Owner:WESTERN DIGITAL TECHNOLOGIES INC
Magnetic recording device
To provide a magnetic recording device that enables improved recording density. [Solution] According to the embodiment, the magnetic recording device includes a magnetic head and a control unit. The magnetic head includes first and second magnetic poles, a magnetic element, and a coil. The control unit is configured to switch between performing a first operation and a second operation. In the first operation, the control unit supplies a first recording element current to the magnetic element. In the second operation, the control unit supplies a second recording element current to the magnetic element. The first recording element current is less than or equal to a first current value. The second recording element current exceeds the first current value.
Owner:KK TOSHIBA +1
Data storage device with assistive bursts in servo sectors
PendingUS20260128060A1Record information storageRecording/reproducing/erasing methodsComputer hardwareEngineering
Various illustrative aspects are directed to a data storage device, method, and one or more processing devices that are configured to: during a read operation, open a servo gate in the selected head in order to read the first servo bursts, the sync mark, and the second servo bursts in one of the servo sectors; and determine a position error signal for the selected head based on reading the first servo bursts and the second servo bursts.
Owner:WESTERN DIGITAL TECHNOLOGIES INC
Magnetic recording medium, method for manufacturing a magnetic recording medium, and magnetic storage device
The present invention provides a magnetic recording medium that stably maintains a state in which a granular magnetic layer forms a granular structure internally, thereby further improving the areal recording density. [Solution] The magnetic recording medium 1 comprises a substrate 10, an underlayer 20, a first magnetic layer 30, and a second magnetic layer 40 in this order. The first magnetic layer contains magnetic particles having an L10 structure, and the second magnetic layer has a granular structure with magnetic particles having an L10 structure and grain boundaries containing hexagonal boron nitride. The (111) plane of the magnetic particles contained in the first magnetic layer is covered with an alloy of VN, Si3N4, YN, or TiN at the interface with the second magnetic layer. The magnetic particles contained in the second magnetic layer are epitaxially grown from the (001) plane of the magnetic particles contained in the first magnetic layer. The magnetic particles contained in the first magnetic layer and the magnetic particles contained in the second magnetic layer are columnar crystals that penetrate the first magnetic layer and the second magnetic layer, respectively.
Owner:RESONAC HARD DISK CORP
Triangular principal pole design with a natural leading edge taper to maximize areal density capacity in perpendicular magnetic recording.
This invention provides a main magnetic pole design method and a writing head that maximize the areal density capacity in direct magnetic recording (PMR). [Solution] A principal magnetic pole (MP) design method having a triangular shape and a leading edge taper to maximize surface density capacity, wherein the leading edge taper is included on the leading shield (LS) to form a taper angle on the MP to concentrate magnetic flux on the MP 102. The MP may be shifted away from the LG to provide an additional leading gap (LG) portion on the front side of the MP, and the taper angle may be larger than the LG in the additional LG portion. The MP design results in a larger MP surface area on the air bearing surface (ABS) and a larger magnetic flux to the medium bit.
Owner:HEADWAY TECHNOLOGIES INC
Magnetic recording device
To provide a magnetic recording device that enables improved recording density. [Solution] According to the embodiment, the magnetic recording device includes a magnetic head and a control unit. The magnetic head includes first and second magnetic poles, a magnetic element, a coil, a first terminal, and a second terminal. The control unit is configured to perform a first operation. In the first operation, the control unit is configured to supply a recording element current to the magnetic element and a recording coil current to the coil. The absolute value of the recording coil current is less than or equal to the first coil current value corresponding to the first peak.
Owner:KK TOSHIBA +1
Magnetic recording apparatus
PendingCN121641079AConstruction of head windingsRecord information storageMagnetic polesRecording density
The present disclosure provides a magnetic recording device capable of improving recording density. According to one embodiment, a magnetic recording apparatus includes a magnetic head and a control unit. The magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, a coil, a first terminal, and a second terminal. The control unit is configured to perform a first operation. In the first operation, the control unit supplies a recording-time element current to the magnetic element and supplies a recording-time coil current to the coil. The absolute value of the coil current during recording is equal to or less than a first coil current value corresponding to the first peak.
Owner:KK TOSHIBA +1
Magnetic disk device
PendingCN121662093ARecording/reproducing/erasing methodsTrack selection/addressing detailsDisk packEngineering
Provided is a magnetic disk device capable of efficiently searching for commands. According to the present embodiment, a magnetic disk device includes a magnetic disk, a memory, and a controller. The disk includes a plurality of regions to which unique addresses are assigned, respectively. The memory stores a plurality of unprocessed commands. The controller stores a database of a tree-like structure in a memory. The configuration includes a plurality of nodes associated with each of a plurality of addresses specified by each of a plurality of unprocessed commands, and two of the plurality of nodes are associated with each other. The controller selects a candidate command from a command associated with an address larger than the start address and closest to the start address and a command associated with an address smaller than the start address and closest to the start address, the candidate command being a candidate to be executed next among the plurality of unprocessed commands.
Owner:KK TOSHIBA +1
Data storage device with auxiliary pulse trains in servo sectors
PendingCN121999809ARecord information storageRecording/reproducing/erasing methodsControl engineeringControl theory
The invention relates to a data storage device with auxiliary pulse trains in servo sectors. Various illustrative aspects relate to a data storage device, a method, and one or more processing devices configured to open a servo gate in a selected head during a read operation, the first servo pulse train, the synchronization mark and the second servo pulse train in one of the servo sectors are read; and determining a position error signal of the selected head based on reading the first servo pulse train and the second servo pulse train.
Owner:WESTERN DIGITAL TECHNOLOGIES INC
Magnetic disk device and control method thereof
The invention provides a magnetic disk device and a control method thereof capable of suppressing fluctuation of a floating amount of a magnetic head. According to the present embodiment, a magnetic disk device controls the driving of a first actuator in order to seek a magnetic head to a target position on a magnetic disk, and controls the driving of a second actuator in order to finely adjust the position of the magnetic head at the target position on the magnetic disk. The drive voltage for the second actuator is changed in stages each time at a predetermined voltage limit value. While superimposing a high-frequency signal on a drive voltage for a second actuator output from a second control unit, a fluctuation in the amount of floating of the magnetic head is detected, and the voltage limit value is set on the basis of the detection result.
Owner:KK TOSHIBA +1
Magnetic disk device, control method, and learning method
PendingCN121708964AModification of read/write signalsRecord information storageSimulationControl theory
Provided are a magnetic disk device, a control method, and a learning method capable of appropriately controlling the operation of a magnetic head. In a magnetic disk device according to an embodiment, a controller performs writing on a first track among a plurality of tracks during a period in which writing is performed on the first track. A determination model is used to determine whether or not the distance in the radial direction from a target position of the first track to the position of the magnetic head exceeds a threshold value when the position of the magnetic head varies from the target position of the first track to a second track side different from the first track among the plurality of tracks, and if the distance does not exceed the threshold value, the position of the magnetic head changes from the target position to the position of the magnetic head. When the distance exceeds the threshold value, writing to the first track is performed, and when the distance exceeds the threshold value, writing to the first track is not performed. The determination model is a learned model that inputs a plurality of pieces of position error information obtained by reading the servo information from each of a plurality of servo regions and outputs whether or not the distance exceeds the threshold value during movement of the magnetic head in the plurality of servo regions.
Owner:KK TOSHIBA +1
Magnetic recording medium and magnetic recording / recovery device
PendingJP2026112229AManufacture of flux-sensitive headsRecord information storageComputational physicsNon magnetic
To provide highly reliable magnetic recording media and magnetic recording / recovery devices. [Solution] A magnetic recording medium having a magnetic layer on a non-magnetic substrate, wherein the height is 0.1 nm or more and 1.5 nm or less, and the width is 1 μm or more and 15 μm or less, and the location of the defect portion having a non-periodic convex shape is specified, or there is no defect portion having a non-periodic convex shape, or the amount of non-periodic convex shape is below a reference value.
Owner:RESONAC HARD DISK CORP
Magnetic tape, magnetic tape cartridge, and magnetic tape device
To provide a magnet tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder is provided, the magnetic tape exhibiting a nonlinear component of a signal phase difference of 17.5 nm or less after 10-day storage in an environment with temperature of 60°C and relative humidity of 20%. Also provided are a magnetic tape cartridge comprising the magnetic tape, and a magnetic tape device.SELECTED DRAWING: None
Owner:FUJIFILM CORP
Magnetic disk device
PendingCN121708963ARecord information storageRecording/reproducing/erasing methodsControl theoryMechanical engineering
Owner:KK TOSHIBA +1
Information processing device, analysis method, and analysis program
The present invention improves calculation accuracy in the calculation of the Curie temperature for each particle size. An information processing device according to the present invention comprises: a setting unit that acquires particle structure information which indicates the structure of magnetic nanoparticles, first exchange interaction which acts between adjacent atoms of the same type within the magnetic nanoparticles, and second exchange interaction which acts between atoms of the same type in a state in which atoms of different types are arranged therebetween within the magnetic nanoparticles and that sets a magnetic calculation model; a calculation unit that uses the set magnetic calculation model to calculate the magnetization at each temperature, so as to calculate the Curie temperature; and an output unit that associates and outputs the calculated Curie temperature and the particle size of the magnetic nanoparticles included in the particle structure information.
Owner:RESONAC CORP
Magnetic disk device and controlling method of the same
ActiveUS20260080898A1Driving/moving recording headsFluid-dynamic spacing of headsActuatorControl theory
According to one embodiment, a magnetic disk device comprising a magnetic disk, a magnetic head, a first actuator, a second actuator, a detection section which detects a flying amount of the magnetic head to the magnetic disk, and a controller which controls drive of the first actuator and drive of the second actuator.
Owner:KK TOSHIBA +1
Non-magnetic substrate for magnetic recording media, and method for manufacturing magnetic recording media
PendingJP2026112230AManufacture of flux-sensitive headsRecord information storageNon magneticMaterials science
To provide a highly reliable non-magnetic substrate for magnetic recording media. [Solution] A non-magnetic substrate for a magnetic recording medium, which is identified by inspection of the magnetic recording medium 42 as not having a periodic convex shape on its surface, or being below a standard value, wherein the magnetic recording medium has a magnetic layer on the non-magnetic substrate, and in the inspection of the magnetic recording medium by the inspection device 41, the defect portion identified based on the output signal obtained by scanning the surface of the non-magnetic substrate for the magnetic recording medium, which has a magnetic layer formed under heating conditions below a guaranteed temperature, with a thermosensitive resistance element, has a periodic convex shape with a height of 0.1 nm or more and a width of 1 μm or more and a width of 1 μm or more and 15 μm or less.
Owner:RESONAC HARD DISK CORP
Information processing device, analysis method, and analysis program
To improve the accuracy of calculating the Curie temperature for each particle size. [Solution] The information processing device includes a setting unit that acquires particle structure information showing the structure of magnetic nanoparticles, a first exchange interaction acting between adjacent atoms of the same type within the magnetic nanoparticles, and a second exchange interaction acting between atoms of the same type when atoms of different types are placed between them within the magnetic nanoparticles, and sets up a magnetic calculation model; a calculation unit that calculates the Curie temperature by calculating the magnetization at each temperature using the set magnetic calculation model; and an output unit that outputs the particle size of the magnetic nanoparticles included in the particle structure information and the calculated Curie temperature in correspondence.
Owner:RESONAC CORP
Systems for and methods for mode hop detection in heat assisted magnetic recording
PendingUS20260073943A1Optical beam sourcesRecord information storageHeat-assisted magnetic recordingMagnetic media
Mode hop detection is provided. A device includes circuitry to receive, from a reader element an indication of one or more properties of a magnetic medium detected by the reader element. The device includes circuitry to determine an envelope of the signal. The device includes circuitry to adjust, responsive to the envelope, a current provided to a laser configured to heat the magnetic medium.
Owner:AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD
Laser diode for heat-assisted magnetic recording, and related apparatuses, devices, systems, and methods
ActiveUS12664999B1Optical beam sourcesRecord information storageHeat-assisted magnetic recordingMechanical engineering
Laser diodes that include a mirror stack on the light-exit facet. The mirror stack has a reflectivity into the active region that is greater in air than when the laser diode is integrated into an apparatus. Related apparatuses, data storage devices, computing systems, and methods.
Owner:SEAGATE TECH LLC
Magnetic recording medium, positioning method and related equipment
PendingCN121747624ADisposition/mounting of recording headsManufacture head surfaceMechanical engineeringRecording media
The invention provides a magnetic recording medium, a positioning method and related equipment, the magnetic recording medium comprises a servo belt and a positioning belt, the servo belt is used for indicating longitudinal position information, the positioning belt is used for indicating physical position information, and the physical position information is used for indicating a real physical position of the longitudinal position information on the magnetic recording medium. In the magnetic recording medium, in addition to the original servo band, a positioning band for indicating physical position information is additionally added. The physical position information can indicate the real physical position of a certain point, so that the position information of the magnetic recording medium on the logic level and the position information of the magnetic recording medium on the physical level are communicated, and a user can conveniently process the magnetic recording medium on the physical level.
Owner:HUAWEI TECH CO LTD
Magnetic disk drive
To provide a magnetic disk device that can efficiently search for commands. [Solution] A magnetic disk device according to one embodiment includes a magnetic disk, memory, and a controller. The magnetic disk includes a plurality of areas, each with a unique address. The memory stores a plurality of pending commands. The controller stores a tree-structured database in memory. The structure includes a plurality of nodes, each associated with a plurality of addresses specified by each of the plurality of pending commands, and two of the plurality of nodes are associated with each other. The controller selects a candidate command to be executed next from among the plurality of pending commands from a command associated with an address greater than the start address and closest to the start address, and a command associated with an address less than the start address and closest to the start address.
Owner:KK TOSHIBA +1
Magnetic recording / reproducing apparatus and method of controlling the same
PendingJP2026017198AProtective coatings for layersHeads using thin filmsHeat-assisted magnetic recordingPhoto irradiation
To suppress the occurrence of errors at the time of recording or reproducing data by reducing the difference in level of a lubricant on the surface of a magnetic recording medium.SOLUTION: According to an embodiment, there is provided a method of controlling a heat assisted magnetic recording and reproducing device in which a heat assisted magnetic recording head including a main magnetic pole, a near field transducer that generates near field light, a waveguide that propagates light to the near field transducer, and a laser light source that supplies light to the waveguide, and a heat assisted magnetic recording medium including a lubricant layer on a recording surface facing the heat assisted magnetic recording head are mounted, the method including: And performing a smoothing process of a surface of the lubricant layer by operating the thermally assisted magnetic recording head.SELECTED DRAWING: Figure 1
Owner:KK TOSHIBA +1