HK49494A - Compensation method to correct thermally induced off-track errors in disc drives - Google Patents

Compensation method to correct thermally induced off-track errors in disc drives

Info

Publication number
HK49494A
HK49494A HK49494A HK49494A HK49494A HK 49494 A HK49494 A HK 49494A HK 49494 A HK49494 A HK 49494A HK 49494 A HK49494 A HK 49494A HK 49494 A HK49494 A HK 49494A
Authority
HK
Hong Kong
Prior art keywords
track
thermal
transducer
micro
written
Prior art date
Application number
HK49494A
Other languages
English (en)
Inventor
James N Krause
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
Application filed by Seagate Technology filed Critical Seagate Technology
Publication of HK49494A publication Critical patent/HK49494A/xx

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
    • G11B5/5565—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for compensation of variations of physical parameters, e.g. temperature
    • 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)
  • Control Of Temperature (AREA)
  • Testing Of Coins (AREA)
HK49494A 1985-11-20 1994-05-19 Compensation method to correct thermally induced off-track errors in disc drives HK49494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/800,061 US4620244A (en) 1985-11-20 1985-11-20 Compensation method to correct thermally induced off-track errors in disc drives

Publications (1)

Publication Number Publication Date
HK49494A true HK49494A (en) 1994-05-27

Family

ID=25177411

Family Applications (2)

Application Number Title Priority Date Filing Date
HK49494A HK49494A (en) 1985-11-20 1994-05-19 Compensation method to correct thermally induced off-track errors in disc drives
HK98109788A HK1009067A1 (en) 1985-11-20 1998-08-10 Methods of monitoring operating temperatures in disc drives to prevent thermal mistracking

Family Applications After (1)

Application Number Title Priority Date Filing Date
HK98109788A HK1009067A1 (en) 1985-11-20 1998-08-10 Methods of monitoring operating temperatures in disc drives to prevent thermal mistracking

Country Status (9)

Country Link
US (1) US4620244A (de)
EP (2) EP0522597B1 (de)
JP (1) JP2583220B2 (de)
AT (1) ATE101744T1 (de)
AU (1) AU589334B2 (de)
CA (1) CA1283975C (de)
DE (2) DE3650669T2 (de)
HK (2) HK49494A (de)
SG (1) SG48190A1 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61134976A (ja) * 1984-12-06 1986-06-23 Canon Inc ヘツド位置決め方法
JPS623473A (ja) * 1985-06-28 1987-01-09 Toshiba Corp 磁気ヘツドの位置決め制御方式
US4816938A (en) * 1986-06-02 1989-03-28 Xebec Process for determining data disk track centers
JPS62285280A (ja) * 1986-06-04 1987-12-11 Alps Electric Co Ltd Ｏトラツクリストア方法
USRE35302E (en) * 1986-08-27 1996-07-23 Sony Corporation Magnetic disc apparatus
US4974109A (en) * 1986-08-27 1990-11-27 Sony Corporation Hard disk drive employing a reference track to compensate for tracking error
US5163162A (en) * 1990-11-14 1992-11-10 Ibm Corporation System and method for data recovery in multiple head assembly storage devices
US5233487A (en) * 1991-06-27 1993-08-03 International Business Machines Corporation Functional measurement of data head misregistration
US6483658B1 (en) 1994-01-28 2002-11-19 Seagate Technology Llc Method of measuring the read-to-write offset in a disc drive having separate read and write elements
US6061201A (en) * 1994-02-07 2000-05-09 Seagate Technology, Inc. Method of measuring the read-to-write offset in a disc drive having separate read and write elements
JP2002538570A (ja) 1999-02-22 2002-11-12 シーゲイト テクノロジー エルエルシー 再現性ランアウト・エラーの補償
WO2000068939A1 (en) 1999-05-07 2000-11-16 Seagate Technology Llc Repeatable runout compensation using iterative learning control in a disc storage system
CN1363087A (zh) 1999-07-23 2002-08-07 西加特技术有限责任公司 使用带有预定参数的学习算规的可重复偏离补偿
US6952320B1 (en) 1999-12-16 2005-10-04 Seagate Technology Llc Virtual tracks for repeatable runout compensation
JP2004530237A (ja) 2000-10-10 2004-09-30 シーゲイト テクノロジー エルエルシー 信号の劣化を測定する方法及びその装置
SG114553A1 (en) * 2001-06-29 2005-09-28 Seagate Technology Llc Systems, apparatus, and methods to determine thermal decay characterization from an equalized signal-to-noise ratio of a magnetic disc drive device

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412386A (en) * 1964-09-01 1968-11-19 Mohawk Data Sciences Corp Random access positioning means for a magnetic disc file
GB1549439A (en) * 1976-07-06 1979-08-08 Data Recording Instr Co Magnetic disc storage devices
FR2373819A1 (fr) * 1976-12-09 1978-07-07 Burroughs Corp Installation et procede de positionnement notamment pour tetes de lecture de disque
GB1516239A (en) * 1976-12-09 1978-06-28 Burroughs Corp Positioning system and method particularly useful for magnetic disc drives
JPS54119907A (en) * 1978-03-10 1979-09-18 Hokushin Electric Works Magnetic disk memory
US4445153A (en) * 1980-03-07 1984-04-24 Ricoh Company, Ltd. Method of correcting track misalignment of floppy disc and apparatus therefor
JPS5794964A (en) * 1980-12-01 1982-06-12 Nec Corp Magnetic disk device
US4536809A (en) * 1982-05-10 1985-08-20 Digital Equipment Corporation Adaptive misposition correcting method and apparatus for magnetic disk servo system
EP0262690B1 (de) * 1982-05-10 1993-12-01 Digital Equipment Corporation Positioniersteuerungsverfahren mit sowohl kontinuierlichen als auch angefügten Informationen für einen Magnetplattenspeicher
JPS58200471A (ja) * 1982-05-19 1983-11-22 Hitachi Ltd ヘツド切換え方式
US4499510A (en) * 1982-08-03 1985-02-12 Weltec Digital, Inc. Precision alignment system for information storage devices
JPS5930270A (ja) * 1982-08-10 1984-02-17 Hitachi Maxell Ltd デイスク状記録媒体
US4485418A (en) * 1982-08-12 1984-11-27 Magnetic Peripherals, Inc. System and method of locating the center of a track on a magnetic storage disk
JPS59144079A (ja) * 1983-02-08 1984-08-17 Sony Corp 磁気円盤記録再生装置
JPS6057583A (ja) * 1983-09-07 1985-04-03 Seiko Epson Corp 回転式磁気記録再生装置
JPS6087477A (ja) * 1983-10-19 1985-05-17 Fujitsu Ltd 磁気デイスク装置の磁気ヘツド制御方式
JPS60136975A (ja) * 1983-12-26 1985-07-20 Hitachi Ltd 磁気記録再生装置
JPS60191481A (ja) * 1984-03-09 1985-09-28 Mitsubishi Electric Corp デイスク装置

Also Published As

Publication number Publication date
DE3689648D1 (de) 1994-03-24
DE3689648T2 (de) 1994-05-19
US4620244A (en) 1986-10-28
ATE101744T1 (de) 1994-03-15
EP0224379A2 (de) 1987-06-03
SG48190A1 (en) 1998-04-17
JPS62217472A (ja) 1987-09-24
DE3650669T2 (de) 1998-07-23
AU6538986A (en) 1987-05-28
EP0224379A3 (en) 1989-06-14
JP2583220B2 (ja) 1997-02-19
CA1283975C (en) 1991-05-07
HK1009067A1 (en) 1999-05-21
DE3650669D1 (de) 1998-05-07
EP0224379B1 (de) 1994-02-16
EP0522597A3 (en) 1994-07-20
EP0522597B1 (de) 1998-04-01
AU589334B2 (en) 1989-10-05
EP0522597A2 (de) 1993-01-13

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)