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74results about "Track selection/addressing details" patented technology
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Techniques for ultrahigh density writing with a probe on erasable magnetic media
Techniques for ultrahigh density writing on an erasable magnetic medium include using a micromachined mechanism having two probes for writing to the medium. Use of the two probe embodiment eliminates the need to change the magnetic orientation of the probe. In another embodiment, a single probe is provided which is heated to the vicinity of its Curie temperature to enable the magnetic orientation of the probe to be switched. The probe may be heated to its Curie temperature through the use of a heating element or a focused laser. In another embodiment of the present invention, either the magnetic orientation of the probe or the magnetic orientation of the medium may be switched through the combination of a static magnetic field, a radio frequency magnetic field and, under certain circumstances, the magnetic field of the probe. In all cases, the writing techniques enable information to be written to a magnetic medium in a manner which enables the information to be erased and the medium rewritten.
Owner:CARNEGIE MELLON UNIV
Magnetic data storage fixed hard disk drive using stationary microhead array chips in place of flying-heads and rotary voice-coil actuators
InactiveUS6249824B1Input/output to record carriersApparatus modification to store record carriersHard disc driveTransducer
A magnetic data storage fixed hard disk drive using stationary Microhead Array Chips in place of conventional Flying-Heads and Rotary Voice-Coil Actuators or other Servo-Tracking mechanisms. Every Microhead Array Chip has a minimum of one thousand or maximum of four billion individual and addressable microhead read and write data-transducers built into it. The hard disk drive unit assembly that uses the Microhead Array Chip approach will have within its assembly as few as two or as many as twenty-eight installed Microhead Array Chips. The Microhead Array Chip hard disk drive unit assemblies will have at least one storage disk-platter with two disk-platter data-surfaces containing a multiplicity of concentric data-tracks that rotates at a substantially constant angular velocity. While Microhead Array Chips are made stationary by specially designed circuit boards, that positions a Microhead Array Chip over each of two data-surfaces of every disk-platter within the hard disk drive assembly. The total number of microheads within a stationary positioned Microhead Array Chip's Microhead Array is what determines the total number of available tracks on and across a data-platter's data-surface (i.e., 65,000 microheads would equal 65,000 cylinder / tracks).
Owner:OPTICAL STORAGE DEVICES
Multiple section head assembly for dual azimuth recording
ActiveUS7239465B1Record information storageRecording/reproducing/erasing methodsEngineeringMechanical engineering
A magnetic head assembly for writing multiple tracks to a tape that travels in a first direction is provided. The assembly includes a first head section for writing a first subset of the tracks, and a second head section for writing a second subset of the tracks. Furthermore, one head section is canted with respect to a plane that is transverse to the first direction, such that the head sections write two adjacent tracks at different angles with respect to the plane.
Owner:ORACLE INT CORP
Multitrack readback and multiuser detection for disk drives
Techniques for reading data from a storage medium (150) having a high track density prone to adjacent track interference are disclosed. One or more sensing elements (120) are used to extract data stored on adjacent tracks. Multiuser detection (130) is then used to detect / decode a single track that is closely spaced to its neighboring tracks, resolve interference from adjacent tracks, or to simultaneously detect / decode multiple adjacent closely packed tracks.
Owner:COLLISION COMM INC
Data recording and reproducing device, data recording and reproducing method, and recording medium
InactiveUS20060182004A1Improve recording densityImprove reading resolutionNanoinformaticsRecord information storageData recordingCantilever
A position control area (76A) is partly formed in the recording area (75) of a recording medium (70) and position information is recorded only in the position control area (76A). To record data in the recording medium (70) by a head (60) having a plurality of cantilevers (62A), (62B), . . . , the position information is read by the cantilever (62E) corresponding to the position control area (76A) and, based on the position information, the positioning control or moving control of all the other cantilevers is performed.
Owner:PIONEER CORP
High reliability-parallel data transfer hard disk drive
InactiveUS7199981B2Avoid constraintsOvercomes shortcomingHeads using thin filmsRecord information storageData streamAccess time
A dual actuator arm assembly system that uses two pairs of actuator-carriage arms that linearly move over a stationary micro-rail independently. The geometric shape of the two pairs of actuator carriage arms conform to the arcs of the data tracks at an acute angle. System enables micro-actuation that is integrated to actuator arm and is a function of its geometry. Uninterrupted data stream and sector coverage and thus parallel data transfer scheme is made possible. Each actuator move only within a limited range of disk area, thus precision is increased, vibration is minimized and external transfer rate is speeded up and overall access time is shortened. Instant access to two quarters of the disk with two pairs of actuators and to park these without landing the heads—by positioning and constant fly height during idle mode, or when system is turned off, are introduced as what are new in the art.
Owner:ZABTCIOGLU FIKRET M
Methods and systems for magnetic recording
InactiveUS7116514B2Manufacturing heads with multiple gapsAlignment for track following on tapesMagnetic storageTransducer
According to one aspect, methods and systems for determining the position of a recording head using existing data structures on magnetic storage media are provided. In one example, a recording head writes data to an active track on a magnetic storage tape, the recording head including a write element and a read element in a known spatial relationship, wherein the read element is configured to access at least a portion of a reference track when the write element is accessing the active track. A controller determines a relative position of the transducer element to the reference track and repositions the recording head to write data to the active track. The read element may be a backward channel reader or dedicated read element of the recording head for reading reference tracks during read and / or write operations.
Owner:QUANTUM CORP
Laser assisted track width definition and radial control with magnetic recording
InactiveUS6775100B1Increase data capacityReduce the total massTrack finding/aligningNanomagnetismComputer architectureLaser assisted
The present invention provides for the enhancement of the storage capacity of a data disk drive while reducing optical path optics, electronics and / or the mass and complexity of associated read / write heads. The system utilizes light transmitted by optical elements to servo track a data disk and to heat the data disk during reading and writing of data, and magnetic elements for actual reading and writing.
Owner:SEAGATE TECH LLC
Methods and systems for magnetic recording
InactiveUS20050083600A1Manufacturing heads with multiple gapsAlignment for track following on tapesMagnetic storageTransducer
According to one aspect, methods and systems for determining the position of a recording head using existing data structures on magnetic storage media are provided. In one example, a recording head writes data to an active track on a magnetic storage tape, the recording head including a write element and a read element in a known spatial relationship, wherein the read element is configured to access at least a portion of a reference track when the write element is accessing the active track. A controller determines a relative position of the transducer element to the reference track and repositions the recording head to write data to the active track. The read element may be a backward channel reader or dedicated read element of the recording head for reading reference tracks during read and / or write operations.
Owner:QUANTUM CORP
Composite magnetic head arranged so the reproducing elements do not overlap a pole of a recording element
A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is stabilized. Also, the reliability of the magnetic disk drive using a MR element is enhanced. The magnetic disk drive uses a composite magnet head, which has a plurality of reproduction elements arranged such that the magnetically sensitive layer of a reproduction element of the composite magnetic head does not overlap with the normal direction projection of the recording element, and which lessens the influence of a recording magnetic field on the magnetically sensitive portion of each reproduction element.
Owner:HITACHI GLOBAL STORAGE TECH JAPAN LTD
Tape head layout having offset read and write element arrays
ActiveUS8045290B2Driving/moving recording headsManufacturing heads with multiple gapsComputer hardwareComputer science
A tape head assembly for writing data to and reading data from a tape includes a tape head member having an engagement surface that is configured to engage the tape as the tape moves past the tape head member. A plurality of arrays of interactive elements are supported on the engagement surface. Each array is longitudinally offset from each other array. Each individual array includes a read group having only read elements and a write group having only write elements. Each read group is laterally offset from each write group within each array.
Owner:ORACLE INT CORP
Dual writer head design
ActiveUS20160148629A1Well formedFilamentary/web carriers operation controlHeads using thin filmsComputer hardwareTransducer
A storage device includes a transducer head with multiple write elements having write poles of different sizes. For example, the transducer head may include two write poles of different width configured to write to a same surface of a storage medium. A controller of the storage device is configured to selectively engage one of the multiple write elements to write data to the storage medium.
Owner:SEAGATE TECH LLC
Thermal assist head slider
InactiveUS7525765B2Reduce in quantityLow powerRecord information storageFluid-dynamic spacing of headsHeat-assisted magnetic recordingEngineering
Owner:WESTERN DIGITAL TECH INC
Method and apparatus for preventing ESD and EOS damage in manufacturing magnetoresistive effect read heads
InactiveUS6914758B2High and low resistance stateNanomagnetismNanoinformaticsPhase changeLow resistance
A magnetoresistive head apparatus includes first and second readers. The first reader is a magnetoresistive reader. The second reader provides electrostatic discharge protection for the first magnetoresistive reader. The second reader can be a second magnetoresistive reader having substantially the same film structure as the first reader. The second reader can also include a phase change thin film, which has high and low resistance states that are changeable using a laser.
Owner:SEAGATE TECH LLC
Thermal assist head slider
InactiveUS20060119971A1Small amount of power consumptionReduce in quantityFluid-dynamic spacing of headsRecord information storageHeat-assisted magnetic recordingEngineering
In a magnetic disk apparatus, mounting of plural heating elements to a magnetic head slider is permitted. Thermally assisted magnetic recording from inner to outer surface is permitted at a small amount of power consumption. In one embodiment, the magnetic disk apparatus has a magnetic disk on which magnetic information is recorded, a magnetic head slider having an air bearing surface for floating from the magnetic disk in proximity thereto, and a rotary actuator moving over the disk arcuately while supporting the magnetic head slider by a suspension. A recording element acting to record magnetic information on the magnetic disk, a playback element acting to play back the magnetic information recorded on the magnetic disk, and plural heating elements acting to locally heat the magnetic disk are carried on the magnetic head slider. A circuit for switching energization to the plural heating elements and according to information about the direction of a DC power supply VH, frequency contained in an AC power supply, or the like is formed.
Owner:WESTERN DIGITAL TECH INC
Write head layout
InactiveUS20050013042A1Lower requirementManufacture head surfaceManufacturing heads with multiple gapsMagnetic mediaComputer science
A matrix write head for recording data on recordable magnetic media includes an arrangement of write heads on a substrate. The write heads have write gaps which are arranged in a plough configuration. A very small guard band, or none at all, is provided between the tracks written by the write heads. Read gaps may be provided on the substrate, as well as edge detectors.
Owner:O MASS
Data recording and reproducing device, data recording and reproducing method, and recording medium
InactiveUS7502304B2Improve recording density and reading resolutionIncrease capacityNanoinformaticsRecord information storageData recordingPosition control
A position control area (76A) is partly formed in the recording area (75) of a recording medium (70) and position information is recorded only in the position control area (76A). To record data in the recording medium (70) by a head (60) having a plurality of cantilevers (62A), (62B), . . . , the position information is read by the cantilever (62E) corresponding to the position control area (76A) and, based on the position information, the positioning control or moving control of all the other cantilevers is performed.
Owner:PIONEER CORP
Magnetic disk device, access control method thereof and storage medium
InactiveUS20050283653A1Reliable maintenanceMaintain reliabilityRecord information storageDigital signal formattingRAIDData access
The present invention aims at offering a magnetic disk device for configuring RAID in a single disk device. The device can configure RAID using one disk and furthermore only one surface (referred to as a single-surface RAID method) neither requiring a plurality of actuators nor performing a data writing processing, etc. more than once. For that purpose, a plurality of data access heads is provided for each arm and the heads are positioned so as to access different tracks on a same surface on a disk.
Owner:FUJITSU LTD
Slider having transducers orientated in different directions
InactiveUS7532437B2Extended range of motionReduce adverse effectsRecord information storageFluid-dynamic spacing of headsTransducerEngineering
Transducers are oriented differently to address the skew phenomenon. This enables a greater area of the medium to be utilized for data storage, thereby increasing the storage capacity of the device implementing embodiments of the present invention.
Owner:SEAGATE TECH LLC
Method for obtaining head positions in magnetic data writing apparatus
ActiveUS6934112B2Shorten the time periodImprove relationshipFilamentary/web carriers operation controlTrack finding/aligningSoftware engineeringMagnetic disks
A method for obtaining relative positional relationships between a read-only head for reading data from an original disk and servo heads on each surface of magnetic disks (copy disks), in a magnetic data writing apparatus (disk servo writer) that stacks copy disks and an original disk to rotate the disks unitarily. The apparatus includes a rotary positioner on the periphery of the copy disks and a read-only disk, stacking the read-only head and servo heads rotatably. The apparatus causes the servo heads simultaneously to write servo data to respective assigned track ranges. The method includes stacking calibration disks storing servo data in place of the copy disks in a coaxial relation with the read-only head, in advance of writing magnetic data to the copy disks. Using the calibration disks, relative positional relationships are obtained as between the address that the read-only head reads out from the original disk and the addresses that servo heads read out from calibration disks at the same time that the read-only head reads out the address thereof.
Owner:FUJI ELECTRIC CO LTD
Device select system for multi-device electronic system
A device select system according to one embodiment includes an array of first electrical contacts adapted for coupling to a cable; an array of second electrical contacts adapted for coupling to an array of transducers, there being more second electrical contacts than first electrical contacts each of the first electrical contacts being associated with at least two of the second electrical contacts; and a select mechanism for selectively placing each of the first electrical contacts in electrical communication with one of the second electrical contacts associated therewith.
Owner:GLOBALFOUNDRIES INC
Photoconductive optical write driver for magnetic recording
InactiveUS20050111129A1Construction of head windingsFilamentary/web carriers operation controlElectrical conductorSwitched current
A write driver for use with a magnetic recording head includes a photoconductive switch that is positioned adjacent a magnetic recording head for switching current waveforms. Both light and a DC voltage are applied to the photoconductive switch to switch the applied current waveforms. The write driver further includes means for writing to a storage medium in response to current waveforms switched by the photoconductive switch. The write driver may also include a suspension that supports at least one photoconductive switch, DC conductors for supplying a DC voltage, means for supplying light, and recording head means for writing to a storage medium.
Owner:SEAGATE TECH LLC
Magnetic tape apparatus with housing in which playback electronics and magnetic tape is permanently disposed
InactiveUS6016233AAvoid small quantitiesIncrease bitrateFilamentary/web carriers operation controlRecord information storageMagnetic tapeData recording
A magnetic tape apparatus for the recording and reproduction of signals, including a magnetic tape having plural data tracks running parallel to an edge of the tape; a multi-track reading device including a multi-track playback head configured to read simultaneously plural of the tracks and output signals corresponding to data recorded on the plural tracks; and a housing in which the tape and the reading device are permanently disposed; wherein the tape is adapted for simultaneous recording of data onto plural data tracks of the tape via external recording heads upon the apparatus being connected to an external recording facility.
Owner:DEUTSCHE THOMSON-BRANDT GMBH
Magnetic disk drive
InactiveUS7379257B2Suppresses yaw angle dependence upon recordingFilamentary/web carriers operation controlManufacture head surfaceTransducerActuator
A magnetic disk drive includes an actuator arm, a suspension fixed to a tip end of the actuator arm, and a head slider having at least two electromagnetic transducers mounted at a tip end of the suspension. The head slider has a first electromagnetic transducer inclined in a direction in which the inner side face side is nearer to an air outflow end than a central portion thereof, and a second electromagnetic transducer inclined in a direction in which the outer side face side is nearer to the air outflow side than the central portion thereof. A controller performs changeover control such that an inner side data region of a magnetic disk is taken charge of by the first electromagnetic transducer while an outer side data region is taken charge of by the second electromagnetic transducer.
Owner:TOSHIBA STORAGE DEVICE CORP
Compensating for loss of current through shorted tunneling magnetoresistance sensors
InactiveUS9418685B1Loss can be compensatedRecord information storageManufacture of flux-sensitive headsElectricityPower flow
Embodiments of the present invention provide methods, systems, and computer program products for compensating for loss of current through shorted tunneling magnetoresistance (TMR) sensors. In one embodiment, for a magnetic head having multiple TMR read sensors, a first voltage limit is set for most parts and a second voltage limit is set for all of the parts. A number of TMR read sensors which are allowed to function between the first and the second voltage limits is determined using a probability algorithm, which determines the probability that the application of the second voltage limit will result in a dielectric breakdown within an expected lifetime of a drive is below a threshold value. For the number of TMR read sensors which are allowed to function at voltages between the first and second voltage limits, a determined subset of those sensors are then allowed to function at the second voltage limit.
Owner:IBM CORP
Method and system for compensating for adjacent tracks during reading of data
ActiveUS8879193B1Timely controlFilamentary/web carriers operation controlAlignment for track following on tapesData streamComputer science
A method for sampling a current track and an adjacent track of a storage medium includes using a first read head to read a first data stream from the current track, using a second read head to read a second data stream from the adjacent track, delaying one of the first and second data streams to account for a position difference between the first and second read heads, and controlling sampling of the first and second data streams to align the first and second data streams. Controlling the sampling may include applying a synchronous sampling signal to control the first and second read heads so that they sample at synchronous locations, or may include sampling the current and adjacent data tracks at asynchronous locations and interpolating the first and second data streams to provide aligned samples. A storage device may operate in accordance with the method.
Owner:MARVELL ASIA PTE LTD
Processing data recorded on a tape medium
ActiveUS8081396B2Without risk of data lossWithout riskAlignment for track following on tapesRecord information storageComputer hardwareMagnetic tape
Owner:LENOVO GLOBAL TECH INT LTD
Compensating for loss of current through shorted tunneling magnetoresistance sensors
InactiveUS9530440B1Record information storageManufacture of flux-sensitive headsElectricityEngineering
Embodiments of the present invention provide methods, systems, and computer program products for compensating for loss of current through shorted tunneling magnetoresistance (TMR) sensors. In one embodiment, for a magnetic head having multiple TMR read sensors, a first voltage limit is set for most parts and a second voltage limit is set for all of the parts. A number of TMR read sensors which are allowed to function between the first and the second voltage limits is determined using a probability algorithm, which determines the probability that the application of the second voltage limit will result in a dielectric breakdown within an expected lifetime of a drive is below a threshold value. For the number of TMR read sensors which are allowed to function at voltages between the first and second voltage limits, a determined subset of those sensors are then allowed to function at the second voltage limit.
Owner:IBM CORP
Read/write head apparatus and method
InactiveUS20060119973A1Filamentary/web carriers operation controlNanomagnetismComputer hardwareData access
Systems and methods for writing and reading digital information to and from tracks on a platter side of an electromagnetic disk drive system are disclosed. Embodiments of the present invention provide a plurality of read elements and write elements in fixed positions, with respect to tracks of a magnetic disk of the electromagnetic disk drive system. There is a one-to-one correspondence between read and write elements and tracks. As a result, many tracks may be written to and / or read from simultaneously on a single platter side of the magnetic disk, providing increased data access rates.
Owner:TRANSPECTRAL SYST
Device select system for multi-device electronic system
A device select system according to one embodiment includes an array of first electrical contacts adapted for coupling to a cable; an array of second electrical contacts adapted for coupling to an array of transducers, there being more second electrical contacts than first electrical contacts each of the first electrical contacts being associated with at least two of the second electrical contacts; and a select mechanism for selectively placing each of the first electrical contacts in electrical communication with one of the second electrical contacts associated therewith.
Owner:GLOBALFOUNDRIES INC
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