WO1998048412A3 - Microactuator servo system in a disc drive - Google Patents

Microactuator servo system in a disc drive Download PDF

Info

Publication number
WO1998048412A3
WO1998048412A3 PCT/US1998/008035 US9808035W WO9848412A3 WO 1998048412 A3 WO1998048412 A3 WO 1998048412A3 US 9808035 W US9808035 W US 9808035W WO 9848412 A3 WO9848412 A3 WO 9848412A3
Authority
WO
WIPO (PCT)
Prior art keywords
data heads
disc drive
information
servo system
data
Prior art date
Application number
PCT/US1998/008035
Other languages
French (fr)
Other versions
WO1998048412A2 (en
Inventor
John C Morris
Randall D Hampshire
Original Assignee
Seagate Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/924,552 external-priority patent/US6768610B1/en
Application filed by Seagate Technology filed Critical Seagate Technology
Priority to DE19882321T priority Critical patent/DE19882321T1/en
Priority to GB9923669A priority patent/GB2338821B/en
Priority to JP54628298A priority patent/JP2001522505A/en
Publication of WO1998048412A2 publication Critical patent/WO1998048412A2/en
Publication of WO1998048412A3 publication Critical patent/WO1998048412A3/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/24—Head support adjustments
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5552—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59627—Aligning for runout, eccentricity or offset compensation

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

A method and apparatus position a plurality of data heads (116) relative to a plurality of surfaces (180, 182) of at least one disc (178) in a disc drive (110). One of the plurality of data heads (116) corresponds to each of the plurality of surfaces (180, 182). The data heads (116) are provided for writing information to the surfaces (180, 182) and reading information from the surfaces (180, 182). Each of the data heads (116) may be simultaneously positioned relative to the corresponding surfaces (180, 182) using embedded servo information. Information can be simultaneously transferred relative to the corresponding surfaces (180, 182) using the plurality of data heads (116). Uninterrupted sequential data transfers may also be executed without servo overhead. Further, an apparatus (110) is provided for accomplishing such servo control, as is a method of accomplishing model-based servo control.
PCT/US1998/008035 1997-04-18 1998-04-20 Microactuator servo system in a disc drive WO1998048412A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19882321T DE19882321T1 (en) 1997-04-18 1998-04-20 Micro actuator servo system in a disk drive
GB9923669A GB2338821B (en) 1997-04-18 1998-04-20 Microactuator servo system in a disc drive
JP54628298A JP2001522505A (en) 1997-04-18 1998-04-20 Micro Actuator Servo System for Disk Drive

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US4463797P 1997-04-18 1997-04-18
US60/044,637 1997-04-18
US08/924,552 US6768610B1 (en) 1997-08-27 1997-08-27 Microactuator servo system in a disc drive
US08/924,552 1997-08-27

Publications (2)

Publication Number Publication Date
WO1998048412A2 WO1998048412A2 (en) 1998-10-29
WO1998048412A3 true WO1998048412A3 (en) 1999-02-11

Family

ID=26721785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/008035 WO1998048412A2 (en) 1997-04-18 1998-04-20 Microactuator servo system in a disc drive

Country Status (6)

Country Link
JP (1) JP2001522505A (en)
KR (1) KR20010006528A (en)
CN (1) CN1252879A (en)
DE (1) DE19882321T1 (en)
GB (1) GB2338821B (en)
WO (1) WO1998048412A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7009802B1 (en) * 2004-12-17 2006-03-07 Matsushita Electric Industrial Co., Ltd. Systems and methods for printed-media SSW reference pattern with extra servo bursts used near OD
CN103678140A (en) * 2012-09-03 2014-03-26 联想(北京)有限公司 Method for data storage and electronic equipment
JP2020149751A (en) * 2019-03-15 2020-09-17 株式会社東芝 Magnetic disk device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189578A (en) * 1989-06-28 1993-02-23 Hitachi, Ltd. Disk system with sub-actuators for fine head displacement
US5745319A (en) * 1992-08-12 1998-04-28 Kabushiki Kaisha Toshiba Recording/reproducing apparatus with coarse and fine head positioning actuators and an elastic head gimbal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293282A (en) * 1989-11-03 1994-03-08 Conner Peripherals, Inc. Multiple actuator disk drive
JP3166181B2 (en) * 1991-02-28 2001-05-14 株式会社日立製作所 Magnetic storage device
US5343347A (en) * 1992-05-01 1994-08-30 Gilovich Paul A Magnetic disk storage module with multiple sets of actuator arms for simultaneous read/write operations at different circumferential locations within the disk stack
US5519605A (en) * 1994-10-24 1996-05-21 Olin Corporation Model predictive control apparatus and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189578A (en) * 1989-06-28 1993-02-23 Hitachi, Ltd. Disk system with sub-actuators for fine head displacement
US5745319A (en) * 1992-08-12 1998-04-28 Kabushiki Kaisha Toshiba Recording/reproducing apparatus with coarse and fine head positioning actuators and an elastic head gimbal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MIU D., "Silicon Microactuators for Rigid Disk Drives", DATA STORAGE, July/August 1995, pages 33, 34, 36, 37, 38, 40, XP002911252 *

Also Published As

Publication number Publication date
GB9923669D0 (en) 1999-12-08
DE19882321T1 (en) 2000-04-13
GB2338821B (en) 2002-01-09
GB2338821A (en) 1999-12-29
JP2001522505A (en) 2001-11-13
WO1998048412A2 (en) 1998-10-29
CN1252879A (en) 2000-05-10
KR20010006528A (en) 2001-01-26

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