ClassID:

197854

G11B5/5526 - CPC Classification

Classification description:

Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor; Disposition or mounting of heads relative to record carriers with provision for moving the head into or out of its operative position or across tracks; Track change, selection or acquisition by displacement of the head across disk tracks Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof

Sub-classes:
Recent Application in this class:
#1
20260128060
2026-05-07

DATA STORAGE DEVICE WITH ASSISTIVE BURSTS IN SERVO SECTORS

#2
20250149061
2025-05-08

SYMMETRICAL MAGNETIC HEAD AND MAGNETIC MEDIA FOR USE WITH SUCH HEAD

#3
20250149060
2025-05-08

MAGNETIC TAPE REUSE ACROSS PRODUCTS

#4
20250078867
2025-03-06

DATA STORAGE DEVICE WITH FLEXIBLE LOGICAL TRACKS AND RADIUS-INDEPENDENT DATA RATE

#5
20250006223
2025-01-02

Tape Heads Having Tiered Servo Readers

#6
20240087601
2024-03-14

DATA STORAGE DEVICE WITH FLEXIBLE LOGICAL TRACKS AND RADIUS-INDEPENDENT DATA RATE

#7
20240087600
2024-03-14

MAGNETIC DISK DEVICE AND REFRESH PROCESSING METHOD

#8
20240046958
2024-02-08

Magnetic disk device and method

#9
20240005955
2024-01-04

Data storage device with flexible logical tracks and radius-independent data rate

#10
20230360675
2023-11-09

Removable disk clamp for read-write device in archival data storage library

#11
20230186947
2023-06-15

Data storage device with soft on-disk activation of fine actuators

#12
20230075577
2023-03-09

Removable disk clamp for read-write device in archival data storage library

#13
20220351750
2022-11-03

Write timing for RRO field in a constant density servo system

#14
20220108720
2022-04-07

Data storage device demodulating digital data based on number of servo stripes in servo frame

#15
20220059129
2022-02-24

Write timing for RRO field in a constant density servo system

#16
20210272588
2021-09-02

MAGNETIC DISK DEVICE AND WRITE RETRY PROCESSING METHOD

#17
20210166725
2021-06-03

Magnetic disk device and write processing method

#18
20210074321
2021-03-11

MANUFACTURING METHOD OF MAGNETIC DISK DEVICE AND MAGNETIC DISK DEVICE

#19
20200395043
2020-12-17

Dual state actuators controlling for magnetic recording device

#20
20200372931
2020-11-26

Calibrating elevator actuator for disk drive

#21
20200279577
2020-09-03

Magnetic disk device and write processing method

#22
20200184999
2020-06-11

Actuator assembly having dual sensors for detecting the vibration on magnetic disk device

#23
20200020357
2020-01-16

Data-center drive with split-actuator that increases read/write performance via data striping

#24
20190279672
2019-09-12

Actuator assembly having dual sensors for detecting the vibration on magnetic disk device

#25
20190259415
2019-08-22

Magnetic disk controlling device capable of tracking different servo pattern frequencies

#26
20190130936
2019-05-02

Magnetic tape device and head tracking servo method

#27
20190096435
2019-03-28

Magnetic Recording Method

#28
20180373442
2018-12-27

Method and apparatus for caching data in an solid state disk (SSD) of a hybrid drive that includes the SSD and a hard disk drive (HDD)

#29
20180277151
2018-09-27

Magnetic disk device, controller, and method

#30
20180226090
2018-08-09

Disk device with stopper for movable member

#31
20180182417
2018-06-28

Magnetic tape device and head tracking servo method

#32
20180158477
2018-06-07

Disk device with stopper for movable member

#33
20180130488
2018-05-10

Write head offset for shingled magnetic recording (SMR) disk drives

#34
20180047421
2018-02-15

Enlarged substrate for magnetic recording medium

#35
20170249967
2017-08-31

Enlarged substrate for magnetic recording medium

#36
20170092310
2017-03-30

DATA STORAGE DEVICE CONCURRENTLY CONTROLLING AND SENSING A SECONDARY ACTUATOR FOR ACTUATING A HEAD OVER A DISK

#37
20170076750
2017-03-16

Enlarged substrate for magnetic recording medium

#38
20160293208
2016-10-06

Adaptive disturbance rejection using dead zone filter

#39
20160203838
2016-07-14

DISK DRIVE, CONTROL METHOD THEREOF, AND DRIVER IC

#40
20160180873
2016-06-23

Magnetic disk device and determining method of crossing a zone boundary

#41
20160118072
2016-04-28

Enlarged substrate for magnetic recording medium

#42
20150364149
2015-12-17

Enlarged substrate for magnetic recording medium

#43
20150332719
2015-11-19

Servo tracking using a single servo writing pass per track for multi sensors

#44
20150262599
2015-09-17

Semiconductor integrated circuit and operating method for the same

#45
20150228303
2015-08-13

Read channel sampling utilizing two quantization modules for increased sample bit width

#46
20150179213
2015-06-25

Servo channel with equalizer adaptation

#47
20150116863
2015-04-30

Adaptive guard band for multiple heads of a data storage device

#48
20140340788
2014-11-20

Magnetic storage medium comprised of magnetic nanoparticles contained within nanotubes

#49
20130285579
2013-10-31

Actuator driver

#50
20130058600
2013-03-07

Plastic critical tolerance fit component

#51
20120233432
2012-09-13

Dynamic guarding of a storage media

#52
20120162805
2012-06-28

Disk storage device, controller of the same, controlling method performed by the same, and electronic device

#53
20120076343
2012-03-29

Motor drive circuit

#54
20120063028
2012-03-15

MAGNETIC RECORDING APPARATUS

#55
20120019955
2012-01-26

Hard disk drive, method for estimating back electromotive force, and method for controlling velocity of head

#56
20120014232
2012-01-19

Device for accessing address information in an optical disc

#57
20110261660
2011-10-27

Magnetic and optical rotating storage systems with audio monitoring

#58
20110261484
2011-10-27

Reducing the obstruction of air flow through a bypass channel associated with a disk drive using an electrostatic pass-by filter

#59
20110148989
2011-06-23

INK EJECTION DEVICE EMPLOYING CORRUGATED THERMAL ACTUATOR

#60
20110075292
2011-03-31

Log-structured file system for disk drives with shingled writing

#61
20100328813
2010-12-30

Disk drive and error-recovery processing method

#62
20100177444
2010-07-15

VCM driver and PWM amplifier

#63
20100157467
2010-06-24

Quiet retraction system

#64
20100156335
2010-06-24

Method of determining the gain of a BEMF amplifier and relative control circuit of an induction electric motor

#65
20100134917
2010-06-03

METHOD AND APPARATUS FOR OFFSET CONTROL IN A DISK DRIVE

#66
20100067342
2010-03-18

Apparatus and method for adjusting a feed-forward signal for seek control during a seek operation

#67
20100061022
2010-03-11

System and method of current shaping control for retract

#68
20100039728
2010-02-18

METHOD OF DETECTING POSITION OF HEAD AND STORAGE APPARATUS

#69
20090316294
2009-12-24

HEAD POSITIONING CONTROL METHOD, MAGNETIC DISK APPARATUS AND FEEDBACK CONTROL METHOD

#70
20090244756
2009-10-01

Data storage apparatus

#71
20090213487
2009-08-27

Efficient method to detect disk write errors

#72
20090168224
2009-07-02

Method and apparatus for offset control in a disk drive

#73
20090168222
2009-07-02

Correcting a track pitch error with a subsequent servo-write pass

#74
20090141395
2009-06-04

MOUNTING METHOD FOR STORAGE MEDIUM

#75
20090128950
2009-05-21

High aspect ratio motion limiter of a microactuator and method for fabrication

#76
20090128946
2009-05-21

Discontinuous mode back EMF measurement

#77
20090080115
2009-03-26

VCM driver and PWM amplifier

#78
20090077962
2009-03-26

Corrugated thermal actuator

#79
20090059777
2009-03-05

Angular and radial location determination in a control system

#80
20090059419
2009-03-05

Data storage device

#81
20090040647
2009-02-12

Magnetic disk apparatus and magnetic head control method

#82
20090034114
2009-02-05

Magnetic disk drive with head retraction control

#83
20090034107
2009-02-05

REDUNDANT DATA ON HARD DRIVE

#84
20090021859
2009-01-22

Overmolded motor hub

#85
20090002894
2009-01-01

Outer actuator arm constrained layer dampers

#86
20080298196
2008-12-04

Mapping defects on a data wedge basis

#87
20080291564
2008-11-27

Detecting head-disk contact during off-track operations

#88
20080278841
2008-11-13

Selectively inhibiting transducer output responsive to detected jerk

#89
20080247092
2008-10-09

STORAGE DISK DRIVING APPARATUS FOR DRIVING A STORAGE DISK AND A CASE THEREFOR

#90
20080218896
2008-09-11

Head position control device and medium storage device

#91
20080137500
2008-06-12

Method and apparatus for controlling the movement of a head in a disk drive

#92
20080106817
2008-05-08

Multiple sinusoidal seek servo system for reducing seek acoustics and seek time in hard disk drives

#93
20080088964
2008-04-17

Self-tuning settle controller in hard disk drives

#94
20080074780
2008-03-27

Two degree of freedom position control method, two degree of freedom position control device, and medium storage device

#95
20080055769
2008-03-06

Control device, storage device, storage medium, servo data demodulation method, repeatable velocity error measuring device, and computer product

#96
20080030892
2008-02-07

Feedforward controller and methods for use therewith

#97
20080030891
2008-02-07

Back electromotive force (BEMF) calibration method, method of controlling unloading of disk drive apparatus using BEMF calibration method, and disk drive apparatus using the same

#98
20080024898
2008-01-31

High bandwidth data transfer to and from rotating data storage devices

#99
20080019246
2008-01-24

Magnetic and optical rotating storage systems with audio monitoring

#100
20080019245
2008-01-24

Magnetic and optical rotating storage systems with audio monitoring

#101
20080019220
2008-01-24

Magnetic and optical rotating storage systems with audio monitoring

#102
20080019054
2008-01-24

Head stack assembly having a head gimbal including a recessed flexure and hard disk drive including the same

#103
20080013207
2008-01-17

Reducing the obstruction of air flow through a bypass channel associated with a disk drive using an electrostatic pass-by filter

#104
20080013206
2008-01-17

Reducing the obstruction of air flow through a bypass channel associated with a disk drive

#105
20080007271
2008-01-10

Methods and apparatuses for measuring VCM BEMF at a VCM control update rate

#106
20080002303
2008-01-03

Method for manufacturing a magnetic head arm assembly (HAA)

#107
20070291389
2007-12-20

Control device and storage device

#108
20070279794
2007-12-06

Feedforward controller and methods for use therewith

#109
20070268630
2007-11-22

Actuator bearing having non-uniform ball spacing

#110
20070258163
2007-11-08

Magnetic disk drive and a loading/unloading method

#111
20070253100
2007-11-01

Magnetic disk drive with controlled transducer movement during a seek

#112
20070253096
2007-11-01

Adaptively adjusting seek function control parameters based on off-track write events

#113
20070247743
2007-10-25

Disk drive and control method therefor

#114
20070236825
2007-10-11

Differential voice coil motor control

#115
20070236164
2007-10-11

On-chip compensation for a fully differential voice coil motor control

#116
20070211376
2007-09-13

HARD DISK DRIVE DEVICE AND METHOD OF ASSEMBLING THE HARD DISK DRIVE DEVICE

#117
20070188912
2007-08-16

Method of controlling movement of a transducer and disk drive using same

#118
20070188911
2007-08-16

Off track write protection using filtered position error signal

#119
20070188908
2007-08-16

Disk drive that controls heater current according to rotational speed

#120
20070182356
2007-08-09

Storage apparatus, seek control method and program

#121
20070171560
2007-07-26

Magnetic disk devices with data recording areas set separately for each device

#122
20070153666
2007-07-05

Optical information recording apparatus

#123
20070145971
2007-06-28

Magnetic head and disk X-Y test assembly with optimized arrangement for skew angle

#124
20070109688
2007-05-17

Method of coupling a voice coil motor to a base plate of a hard disk drive

#125
20070086108
2007-04-19

Magnetic disk drive with head retraction control

#126
20070086105
2007-04-19

Quiet movie playback for entertainment PC

#127
20070031130
2007-02-08

Control system of motors for rotating a disk and for positioning heads of a mass storage disk device

#128
20070013337
2007-01-18

Adaptive voltage-mode controller for a voice coil motor

#129
20070002497
2007-01-04

Carriage arm assembly for locating magnetic head, and magnetic disk apparatus using the same

#130
20070001632
2007-01-04

Motor drive and magnetic disc apparatus

#131
20060280485
2006-12-14

Control circuit for information storage device

#132
20060233080
2006-10-19

Driving method

#133
20060233069
2006-10-19

Optical pickup and optical disc apparatus provided with the same

#134
20060229290
2006-10-12

Staurosporine derivatives for hypereosinophilic syndrome

#135
20060214956
2006-09-28

Optical disc drive focusing apparatus

#136
20060209456
2006-09-21

Disk drive apparatus

#137
20060202565
2006-09-14

Yoke for voice coil motor in recording disk drive

#138
20060192068
2006-08-31

Method of forming a support structure

#139
20060187567
2006-08-24

Motor driver and magnetic disc apparatus

#140
20060187566
2006-08-24

Spindle speed control using feed-forward estimation in a hard disk drive

#141
20060158786
2006-07-20

Carriage arm assembly for locating magnetic head, and magnetic disk apparatus using the same

#142
20060158776
2006-07-20

Hard disk drive device and method of assembling the hard disk drive device

#143
20060146447
2006-07-06

Manufacturing method of a disk drive unit

#144
20060139813
2006-06-29

Bearing mechanism for head used in magnetic disk drive and magnetic disk drive having the same

#145
20060133224
2006-06-22

Device for accessing address information in an optical disc

#146
20060132982
2006-06-22

Disk drive, and actuator and head actuator assembly

#147
20060132981
2006-06-22

Connection structure for actuator and flexible printed circuit of hard disk drive

#148
20060119988
2006-06-08

Head stack assembly incorporating a pivot assembly having solid lubrication

#149
20060119978
2006-06-08

Method, medium, and apparatus controlling track seek in a recording and/or reproducing apparatus

#150
20060119968
2006-06-08

High bandwidth data transfer to and from rotating data storage devices

#151
20060114614
2006-06-01

Arm chamfer for comb type actuator in rotating disk storage device and carriage assembly

#152
20060103972
2006-05-18

Flexible data TPI in hard disk drives

#153
20060077588
2006-04-13

Generalized sinusoidal trajectory for seek servomechanism of hard drives

#154
20060072237
2006-04-06

Magnetic disk storage system

#155
20060066993
2006-03-30

Disk drive device

#156
20060028759
2006-02-09

Apparatus and method to improve read/write speed of disk drive system

#157
20060023343
2006-02-02

Servo controller in magnetic disk drive

#158
20050270701
2005-12-08

Magnetic head device

#159
20050270682
2005-12-08

Information recording and reproducing apparatus with power supply voltage monitoring function

#160
20050270678
2005-12-08

Data storage device and data storage device control

#161
20050254160
2005-11-17

Data recording system with servo pattern having pseudo-random binary sequences

#162
20050237052
2005-10-27

Acquiring values of back electromotive force for an electric motor

#163
20050219762
2005-10-06

Recording disk drive

#164
20050185321
2005-08-25

Positioner for positioning head on a disk

#165
20050180056
2005-08-18

Carriage arm assembly for locating magnetic head, and magnetic disk apparatus using the same

#166
20050178119
2005-08-18

Thermal actuators

#167
20050162782
2005-07-28

Actuator assembly and rotating disk storage device with efficient voice coil shape

#168
20050157430
2005-07-21

Endcap for reducing airflow excitation of head gimbal assembly

#169
20050157417
2005-07-21

Variable frequency chevron in printed media reference pattern to improve servo demodulation

#170
20050152253
2005-07-14

Track zero determination method used in data storage system and disk drive using the same

#171
20050152071
2005-07-14

Data storage device with support for wiring structure portion to suppress fluttering

#172
20050152060
2005-07-14

System and method for optimizing track spacing across a stroke

#173
20050141140
2005-06-30

Disk apparatus

#174
20050141122
2005-06-30

Method and apparatus for head control, and disk-drive apparatus

#175
20050138265
2005-06-23

Method and apparatus mapping logical tracks in a disk drive for optimizing track seek time

#176
20050135003
2005-06-23

Spindle motor and recording disk driving device comprising the same

#177
20050134997
2005-06-23

Method and apparatus for compensating for torque change in seek servo

#178
20050134994
2005-06-23

Magnetic disk devices with data recording areas set separately for each device

#179
20050134987
2005-06-23

Master medium for magnetic transfer and magnetic disk and magnetic disk drive

#180
20050129264
2005-06-16

System module

#181
20050128631
2005-06-16

Acceleration sensor and disk drive employing it

#182
20050128617
2005-06-16

Information recording medium

#183
20050111140
2005-05-26

Actuator with dynamic characteristic and a four section VCM coil and disk drive having the same

#184
20050105205
2005-05-19

Storage medium and method for actuator movement control

#185
20050099734
2005-05-12

Distributed damper for data storage devices

#186
20050073772
2005-04-07

Deceleration of head in disc drive according to a desired deceleration profile

#187
20050071537
2005-03-31

Log-structured file system for disk drives with shingled writing

#188
20050068664
2005-03-31

System and method for writing HDD depending on direction of head skew

#189
20050068412
2005-03-31

Enhancing optical density

#190
20050057860
2005-03-17

Laser-welded actuator assembly

#191
20050057844
2005-03-17

Digital actuator control and method

#192
20050057639
2005-03-17

Optical disc drive focusing apparatus

#193
20050041321
2005-02-24

Selecting physical cylinders in a disc drive employing discs with pre-written servo patterns

#194
20050034539
2005-02-17

Motor torque variation compensation

#195
20050018339
2005-01-27

Method and system for reducing power consumption in a rotatable media data storage device

#196
20050013037
2005-01-20

Direct detection of coil resistance

#197
20050008341
2005-01-13

Magnetic disk apparatus

#198
20050006964
2005-01-13

Spindle motor for hard disk drives

#199
17469301
2023-01-24

Multi-sector read offset recovery

#200
16808656
2020-12-15

Data storage device employing staggered servo wedges to increase capacity

#201
16588308
2023-12-05

Hard disk access using multiple actuators

#202
16588300
2023-03-21

Multi-actuator storage device access using logical addresses

#203
16583832
2020-07-14

Data storage device capable of overriding a servo command to avoid an overcurrent condition

#204
16538180
2020-12-08

Multi-controller data storage devices and methods

#205
16433110
2020-04-14

Calibrating elevator actuator for disk drive

#206
16051234
2019-12-31

Disc locked clock-based servo timing

#207
15873160
2018-09-04

Head with multiple readers configured for reading interlaced magnetic recording tracks

#208
15798844
2018-12-04

Sensor circuit supporting multiple transducers with dedicated and shared terminals

#209
15798541
2018-07-10

Data storage drive with low-latency ports coupling multiple servo control processors

#210
15691536
2018-10-23

Data storage device comprising extended servo burst field over part of a disk surface

#211
15231513
2018-01-02

Disturbance compensation for dual-stage servo system using vibration sensor

#212
15205190
2017-06-13

Bidirectional shingled magnetic recording in a heat-assisted magnetic recording device

#213
15146623
2017-06-06

Single writer interlaced magnetic recording

#214
14871648
2017-01-31

Anti-reflection waveguide for heat-assisted magnetic recording

#215
14865858
2016-09-06

Data storage device concurrently controlling and sensing a secondary actuator for actuating a head over a disk

#216
14799536
2016-04-19

Data storage device executing retry operation by buffering signal samples at different radial offsets

#217
14719127
2016-03-29

Disk drive slider with sense amplifier for coupling to a preamp through a supply/bias line and a read signal line

#218
14662163
2015-11-24

Electronic system with media maintenance mechanism and method of operation thereof

#219
14522451
2015-09-08

Data management for data storage device with different track density regions

#220
14335653
2015-04-14

Data storage device comprising slew rate anti-windup compensation for microactuator

#221
14278886
2015-09-08

Sector-based write operation

#222
14263511
2015-03-31

Reducing acoustic noise in a disk drive when exiting idle mode

#223
14023776
2015-06-09

Disk drive actuating first head microactuator while sensing signal from second head microactuator