BR9403557A - Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utiliza - Google Patents

Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utiliza

Info

Publication number
BR9403557A
BR9403557A BR9403557A BR9403557A BR9403557A BR 9403557 A BR9403557 A BR 9403557A BR 9403557 A BR9403557 A BR 9403557A BR 9403557 A BR9403557 A BR 9403557A BR 9403557 A BR9403557 A BR 9403557A
Authority
BR
Brazil
Prior art keywords
disk
servo
disk file
servomechanism
phase modulation
Prior art date
Application number
BR9403557A
Other languages
English (en)
Inventor
Todd Barry Anderson
Mark David Hagen
Original Assignee
Ibm
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
Application filed by Ibm filed Critical Ibm
Publication of BR9403557A publication Critical patent/BR9403557A/pt

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
    • 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
    • G11B5/59605—Circuits
    • G11B5/59622—Gain control; Filters
    • 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
    • G11B5/59683—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 for magnetoresistive heads
    • 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
    • G11B5/59688—Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Electric Motors In General (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Automatic Tape Cassette Changers (AREA)
  • Control Of Position Or Direction (AREA)
BR9403557A 1993-09-23 1994-09-14 Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utiliza BR9403557A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12595993A 1993-09-23 1993-09-23

Publications (1)

Publication Number Publication Date
BR9403557A true BR9403557A (pt) 1995-06-20

Family

ID=22422253

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9403557A BR9403557A (pt) 1993-09-23 1994-09-14 Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utiliza

Country Status (12)

Country Link
US (1) US6426844B1 (pt)
EP (1) EP0645764B1 (pt)
JP (1) JPH07169032A (pt)
KR (1) KR100191903B1 (pt)
CN (1) CN1064168C (pt)
AT (1) ATE197852T1 (pt)
BR (1) BR9403557A (pt)
CA (1) CA2127971C (pt)
DE (1) DE69426345T2 (pt)
ES (1) ES2152972T3 (pt)
MY (1) MY113278A (pt)
SG (1) SG47385A1 (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2635942B2 (ja) * 1994-02-10 1997-07-30 インターナショナル・ビジネス・マシーンズ・コーポレイション 直接アクセス記憶装置のサーボ位置決めの方法及び装置
JP3670440B2 (ja) * 1997-05-20 2005-07-13 富士通株式会社 ディスク上の位置検出方法及びディスク装置並びにディスク
US6961203B1 (en) * 2001-03-06 2005-11-01 Maxtor Corporation Hybrid printed servo patterns for magnetic media and hard disk systems implementing same
JP2002373411A (ja) * 2001-06-15 2002-12-26 Fuji Photo Film Co Ltd 磁気記録媒体およびその駆動装置
JP4148951B2 (ja) 2005-01-12 2008-09-10 株式会社東芝 磁気記録再生装置
JP2006221773A (ja) * 2005-02-14 2006-08-24 Fuji Photo Film Co Ltd 円盤状磁気記録媒体
US7209314B2 (en) * 2005-06-09 2007-04-24 Hitachi Global Storage Technologies Netherlands B.V. Disk drive with phase-quadrature servo pattern and demodulated position error signal insensitive to timing and phase-misalignment errors
KR100771881B1 (ko) * 2006-08-23 2007-11-01 삼성전자주식회사 디스크 회전 슬립에 따른 데이터 섹터 위상 보정 방법 및이를 이용한 디스크 드라이브

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5693119A (en) * 1979-12-25 1981-07-28 Nec Corp Servo system for magnetic disk device
JPS56145568A (en) * 1980-04-15 1981-11-12 Mitsubishi Electric Corp Head positioning system
US4549232A (en) 1983-06-27 1985-10-22 International Business Machines Corporation Phase modulated servo system
JPS60129708A (ja) 1983-12-16 1985-07-11 Matsushita Electric Ind Co Ltd 偏光板
US4598327A (en) * 1985-06-28 1986-07-01 International Business Machines Corporation Servo control system using servo pattern time of flight for read/write head positioning in a magnetic recording system
JPS62175924A (ja) * 1986-01-28 1987-08-01 Fujitsu Ltd オフトラツク補償方式
JPS6398820A (ja) * 1986-10-15 1988-04-30 Sony Corp 磁気デイスクの記録方式
US5119248A (en) 1987-10-30 1992-06-02 Brier Technology, Inc. Method of recording servo signals
JPH01220101A (ja) 1988-02-29 1989-09-01 Hitachi Maxell Ltd 移動マルチトラツクヘツド型情報記録装置
US5055951A (en) 1989-03-10 1991-10-08 Irwin Magnetic Systems, Inc. Method and apparatus for servo-positioning movable transducer heads
US5185681A (en) 1990-09-28 1993-02-09 Seagate Thermal offset compensation for high density disk drives
JPH04252415A (ja) * 1991-01-28 1992-09-08 Matsushita Electric Ind Co Ltd 磁気ディスクおよび磁気ディスク装置
JP3082174B2 (ja) * 1991-04-04 2000-08-28 ソニー株式会社 磁気ディスクおよびその駆動装置
JPH05242435A (ja) * 1992-02-27 1993-09-21 Hitachi Ltd 磁気ディスク装置およびヘッド

Also Published As

Publication number Publication date
DE69426345T2 (de) 2001-05-17
SG47385A1 (en) 1998-04-17
JPH07169032A (ja) 1995-07-04
CN1064168C (zh) 2001-04-04
KR100191903B1 (ko) 1999-06-15
CA2127971C (en) 1999-01-12
CN1110824A (zh) 1995-10-25
EP0645764B1 (en) 2000-11-29
ES2152972T3 (es) 2001-02-16
MY113278A (en) 2002-01-31
EP0645764A2 (en) 1995-03-29
EP0645764A3 (en) 1996-09-11
KR950009677A (ko) 1995-04-24
US6426844B1 (en) 2002-07-30
ATE197852T1 (de) 2000-12-15
CA2127971A1 (en) 1995-03-24
DE69426345D1 (de) 2001-01-04

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Legal Events

Date Code Title Description
EG Technical examination (opinion): publication of technical examination (opinion)
ND Extension of time allowed
FF Decision: intention to grant
FD5 Application fees: dismissal - article 86 of industrial property law
NF Application restored
FG9A Patent or certificate of addition granted
B25A Requested transfer of rights approved

Free format text: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (NL)

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 14/09/2014