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16results about "Recording head arrangements" patented technology
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Disk Drive Suspension Assembly With PZT Actuators Having Active And Inactive Regions
A suspension assembly includes a load beam terminating in a hinge, a gimbal assembly mounted to the load beam, and a base plate connected to the hinge and including an opening. A PZT actuator is disposed in the opening and includes first and second opposing ends. The PZT actuator includes active and inactive regions both extending between the first and second opposing ends, PZT material disposed in both the active and inactive regions, and first and second electrodes configured to cause active expansion and contraction of the PZT material in the active region in response to voltage differentials applied to the first and second electrodes, and configured to not cause active expansion and contraction of the PZT material in the inactive region in response to voltage differentials applied to the first and second electrodes of the PZT actuator.
Owner:MAGNECOMP CORP
Method of manufacturing magnetic disk device and magnetic disk device
ActiveUS20250232795A1Apparatus modification to store record carriersRecord information storageStructural engineeringMechanical engineering
A method of manufacturing a magnetic disk device of an embodiment includes: adjusting relative heights of a spindle and a plurality of ramps, the spindle being allowed to rotate in a state in which center axes of a plurality of magnetic disks having ends deviating from a geometrical plane with a center point as a reference are aligned, the plurality of ramps being arranged at end positions of the plurality of magnetic disks; and assembling the plurality of magnetic disks along an axial direction of the spindle in a state in which directions of deviations of the ends from the center point are aligned.
Owner:KK TOSHIBA +1
Method of manufacturing magnetic disk device and magnetic disk device
A method of manufacturing a magnetic disk device of an embodiment includes: adjusting relative heights of a spindle and a plurality of ramps, the spindle being allowed to rotate in a state in which center axes of a plurality of magnetic disks having ends deviating from a geometrical plane with a center point as a reference are aligned, the plurality of ramps being arranged at end positions of the plurality of magnetic disks; and assembling the plurality of magnetic disks along an axial direction of the spindle in a state in which directions of deviations of the ends from the center point are aligned.
Owner:KK TOSHIBA +1
Magnetic tape cartridge, magnetic tape drive, memory, magnetic tape, magnetic tape system, and operation method of magnetic tape drive
ActiveUS12223987B2Manufacture unitary devices of plural headsAlignment for track following on tapesMagnetic tapeComputational physics
A magnetic tape cartridge includes a magnetic tape, and a storage medium in which information on the magnetic tape is stored. The magnetic tape has a recording surface. Data is recorded in the recording surface by a magnetic head in a state in which the magnetic tape is made to travel. The magnetic head is disposed at an inclined posture with respect to a width direction of the magnetic tape along the recording surface. Angle adjustment information obtained at a data recording timing which is a timing at which the data is recorded in the recording surface is stored in the storage medium. The angle adjustment information is information for adjusting an angle at which the magnetic head is inclined with respect to the width direction along the recording surface.
Owner:FUJIFILM CORP
Disk drive suspension assembly with PZT actuator having active and inactive regions
A suspension assembly includes a load beam terminating in a hinge, a gimbal assembly mounted to the load beam, and a base plate connected to the hinge and including an opening. A PZT actuator is disposed in the opening and includes opposing first and second ends. The PZT actuator includes an active region and an inactive region each extending between opposite first and second ends, a PZT material disposed in both the active region and the inactive region, and first and second electrodes, and an active region configured to cause active expansion and contraction of the PZT material in the active region in response to a voltage difference applied to the first electrode and the second electrode, and configured to not cause active expansion and contraction of the PZT material in the inactive region in response to a voltage difference applied to the first electrode and the second electrode of the PZT actuator.
Owner:MAGNECOMP CORP
Magnetic disk device and control method
Embodiments provide a magnetic disk drive and control method capable of preventing degradation of microactuator components. When adjusting the position of a magnetic head using a microactuator, the magnetic disk drive control unit applies a third voltage value based on the second voltage value to the microactuator when the absolute value of the first voltage value applied to the microactuator is corrected based on hysteresis and the absolute value of the second voltage value applied to the microactuator is positive. Furthermore, the control unit operates at least one of the voice coil motor and / or the microactuator other than the microactuator applying the third voltage value to adjust for any shortfall in adjustment by the microactuator.
Owner:KK TOSHIBA +1
Magnetic disk device
ActiveUS12272389B1Record information storageRecording head arrangementsDisks (device)Software engineering
According to one embodiment, a magnetic disk device includes a disk, a read head, and a control unit. The control unit includes a read processing unit that executes first read processing of moving the read head to n1 radial positions within a period in which the disk makes m1 rotations and reading the data of the track, a comparison unit that derives a first signal of highest quality, and a determination unit that determines a radial position at which the first signal of the highest quality is derived as a first appropriate read position. Where 1≤m1<n1.
Owner:KK TOSHIBA +1
Dual-surface self-servo writing for storage devices
ActiveCN114242118BRecord information storageRecording head arrangementsComputer hardwareControl signal
The present disclosure relates to dual-surface self-servo writing (SSW) for a storage device. A method for self-servo writing (SSW) of a storage device includes: detecting an SSW spiral signal from a first track on a first storage medium surface using a first read head; processing the SSW spiral signal from the first track using a first read channel to generate a first control signal for positioning the first read head relative to the first track; detecting an SSW spiral signal from a second track on a second storage medium surface using a second read head; processing the SSW spiral signal from the second track using a second read channel to generate a second control signal for positioning the second read head relative to the second track; positioning the first write head relative to the first track using the first control signal via a single write channel, and positioning the second write head relative to the second track using the second control signal via the single write channel.
Owner:MARVELL ASIA PTE LTD
Disk drive suspension assembly with PZT actuators having active and inactive regions
PCT designated stage expiredWO2025042763A1Arm with actuatorsRecord information storageActuatorVoltage
A suspension assembly includes a load beam terminating in a hinge, a gimbal assembly mounted to the load beam, and a base plate connected to the hinge and including an opening. A PZT actuator is disposed in the opening and includes first and second opposing ends. The PZT actuator includes active and inactive regions both extending between the first and second opposing ends, PZT material disposed in both the active and inactive regions, and first and second electrodes configured to cause active expansion and contraction of the PZT material in the active region in response to voltage differentials applied to the first and second electrodes, and configured to not cause active expansion and contraction of the PZT material in the inactive region in response to voltage differentials applied to the first and second electrodes of the PZT actuator.
Owner:MAGNECOMP CORP
Magnetic disk device
ActiveCN116778974BRecord information storageRecording head arrangementsDisks (device)Software engineering
Provided is a disk device capable of improving data format efficiency. The disk device includes a disk having a zoned servo area (ZBa) including a first region (RE1) having a first servo frequency, a second region (RE2) having a second servo frequency, and a third region (RE3) having the first servo frequency; a head; and a controller that demodulates first servo data of the first region, derives a position of the head, demodulates first correction data of the third region, and corrects the position of the head. The first region (RE1), the second region (RE2), and the third region (RE3) are arranged in order in a traveling direction (d2). The first region (RE1) and the second region (RE2) are adjacent to each other in a circumferential direction of the disk. The second region (RE2) and the third region (RE3) are adjacent to each other in the circumferential direction.
Owner:KK TOSHIBA +1
Tape embedded drive
A storage device 100 comprises tape reel(s) (110) holding tape media for storing data, a head assembly (130), motor(s) (120, 125) configured to actuate the head assembly, a sealed casing, and a printed circuit board assembly (PCBA) configured to control operations of the motor(s). The head assembly comprises a support structure, a head bar with read head(s) and write head(s), and a suspension system connecting the head bar to the support structure. The sealed casing encloses in its interior the tape reel(s), the head assembly, and the motor(s). Meanwhile, the PCBA is mounted on an external surface of the casing.
Owner:WESTERN DIGITAL TECHNOLOGIES INC
Disk device
ActiveCN115731950BRecord information storageRecording/reproducing/erasing methodsComputer hardwareDisks (device)
The present disclosure provides a disk device that can maintain signal quality even when a mode jump occurs in the shingled recording mode. The disk device includes: a disk; a magnetic head having a write head, a thermal assist unit that uses a near-field light element to assist in writing data of the write head, and a read head; a monitoring unit that monitors the light output; and a control unit that controls reading of data and writing of data based on the shingled recording mode. When writing data to the first track, the control unit controls the position of the write head and rewrites the data to the second track that is one track ahead of the first track when the absolute difference between the light output monitored by the monitoring unit during writing and the light output monitored by the monitoring unit in the previous time exceeds a predetermined value.
Owner:KK TOSHIBA +1
Increased VCM current resolution during track follow to decrease nrro
ActiveUS20250124950A1Record information storageAlignment for track following on disksCurrent modeActuator
A data storage device may include one or more disks; a voice coil motor (VCM) driver for driving a VCM and having a programmable transconductance (Gm); an actuator arm assembly comprising one or more disk heads and the VCM, wherein the VCM is configured to operate in a first mode and a second mode; and one or more processing devices configured to control the actuator arm assembly to actuate the disk heads over corresponding disk surfaces of the disks, and further configured to: determine a current mode of operation of the VCM, the current mode of operation comprising the first mode; and transition the VCM from the current mode of operation to a new mode of operation, the new mode of operation comprising the second mode, wherein the transitioning comprises tuning the Gm from a first transconductance value to a second, different transconductance value.
Owner:WESTERN DIGITAL TECHNOLOGIES INC
Magnetic disk device
ActiveCN116705081BManufacture head surfaceDisposition/mounting of recording headsIndustrial engineeringElectrical and Electronics engineering
Owner:KK TOSHIBA +1
Magnetic disk device and post-code writing method
An embodiment provides a magnetic disk device and a post-code writing method capable of improving format efficiency. The magnetic disk device of this embodiment includes: a disk having a first area with a first format efficiency and a second area with a second format efficiency lower than the first format efficiency; a head for writing data to and reading data from the disk; and a controller for selecting a first post-code to be written to the first area and a second post-code to be written to the second area from a plurality of post-codes, and writing the selected post-codes to the first area and the second area, respectively.
Owner:KK TOSHIBA +1
Tape embedded drive
A storage device 100 comprises tape reel(s) (110) holding tape media for storing data, a head assembly (130), motor(s) (120, 125) configured to actuate the head assembly, a sealed casing, and a printed circuit board assembly (PCBA) configured to control operations of the motor(s). The head assembly comprises a support structure, a head bar with read head(s) and write head(s), and a suspension system connecting the head bar to the support structure. The sealed casing encloses in its interior the tape reel(s), the head assembly, and the motor(s). Meanwhile, the PCBA is mounted on an external surface of the casing.
Owner:WESTERN DIGITAL TECHNOLOGIES INC