HK71696A - Positioning separate read and write heads in a disk file - Google Patents

Positioning separate read and write heads in a disk file

Info

Publication number
HK71696A
HK71696A HK71696A HK71696A HK71696A HK 71696 A HK71696 A HK 71696A HK 71696 A HK71696 A HK 71696A HK 71696 A HK71696 A HK 71696A HK 71696 A HK71696 A HK 71696A
Authority
HK
Hong Kong
Prior art keywords
disk file
write heads
separate read
positioning separate
positioning
Prior art date
Application number
HK71696A
Other languages
English (en)
Inventor
John Stewart Best
Po-Kang Wang
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 HK71696A publication Critical patent/HK71696A/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
    • G11B5/58—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
    • G11B5/59633—Servo formatting
HK71696A 1989-11-13 1996-04-25 Positioning separate read and write heads in a disk file HK71696A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/434,152 US5073833A (en) 1989-11-13 1989-11-13 Dual sector servo system for disk file with separate read and write heads

Publications (1)

Publication Number Publication Date
HK71696A true HK71696A (en) 1996-05-03

Family

ID=23723026

Family Applications (1)

Application Number Title Priority Date Filing Date
HK71696A HK71696A (en) 1989-11-13 1996-04-25 Positioning separate read and write heads in a disk file

Country Status (5)

Country Link
US (1) US5073833A (de)
EP (1) EP0428325B1 (de)
JP (1) JP2554393B2 (de)
DE (1) DE69018382T2 (de)
HK (1) HK71696A (de)

Families Citing this family (32)

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Publication number Priority date Publication date Assignee Title
US5327408A (en) * 1990-09-07 1994-07-05 International Business Machines Corporation Optical disk with sector servo patterns compensating for variations in pattern size and/or radial velocity
JPH04232610A (ja) * 1990-10-02 1992-08-20 Internatl Business Mach Corp <Ibm> 情報の読み取り・書き込み装置
US5257149A (en) * 1991-02-13 1993-10-26 Seagate Technology, Inc. Disc drive with offset address field
JP2656186B2 (ja) * 1992-03-30 1997-09-24 富士通株式会社 磁気ディスク装置のデータ面サーボパターン書込み方法
US5715105A (en) * 1992-09-28 1998-02-03 Hitachi, Ltd. Method of and apparatus for recording on and reproducing from disk-type recording medium having recording tracks with sectors each having an ID area and a data area
JPH06195946A (ja) * 1992-12-25 1994-07-15 Nec Corp 磁気ディスク装置
AU673021B2 (en) * 1992-12-28 1996-10-24 Nec Corporation Management apparatus for volume-medium correspondence information for use in dual file system
JP3395235B2 (ja) * 1993-02-09 2003-04-07 ソニー株式会社 情報記録ディスク
US5596463A (en) * 1993-09-08 1997-01-21 Nec Corporation Recording/reproduction apparatus with an integrated inductive write, magnetoresistive read head
KR950020658A (ko) * 1993-12-07 1995-07-24 새끼자와 다다시 자기디스크장치
US5500776A (en) * 1993-12-16 1996-03-19 Seagate Technology, Inc. Self-calibration for computer disk read/write offsets
JP3135447B2 (ja) * 1994-01-27 2001-02-13 富士通株式会社 磁気ディスクドライブの制御方法及びその装置
JP3278284B2 (ja) * 1994-04-14 2002-04-30 富士通株式会社 ディスク装置、及びディスク装置の書き込み方法
JPH0845189A (ja) * 1994-07-29 1996-02-16 Fujitsu Ltd ディスク装置及びディスク媒体のフォーマット作成方法
US5654842A (en) * 1994-08-30 1997-08-05 Sony Corporation Head displacement measuring method and apparatus and data recording/reproducing method and apparatus
EP0713210A1 (de) * 1994-11-16 1996-05-22 Hitachi, Ltd. Magnetplattengerät
JPH08147908A (ja) * 1994-11-17 1996-06-07 Fujitsu Ltd 記録再生方法及び記録再生装置
JP3048878B2 (ja) * 1995-03-31 2000-06-05 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 情報記録媒体、ヘッド位置識別方法、および情報記録装置
KR19990022303A (ko) * 1995-06-06 1999-03-25 칼로타 바스미스 자기 저항 헤드 차동 마이크로 조그
US5691857A (en) * 1995-09-29 1997-11-25 Quantum Corporation Method using matched filters for determining head positioner micro-jog in hard disk drive employing magneto-resistive heads
KR100194938B1 (ko) * 1996-09-02 1999-06-15 윤종용 자기저항 헤드의 트랙밀도 상승을 위한 오프트랙최적화 방법
KR100233669B1 (ko) * 1996-11-01 2000-01-15 윤종용 트랙 쉬프트량 보상을 위한 서보버스트 기록방법및 서보제어방법
US5798890A (en) * 1997-03-05 1998-08-25 International Business Machines Corporation Disk drive with identical three-element, side-by-side heads on opposite disk surfaces
US6320718B1 (en) 1999-01-07 2001-11-20 Western Digital Technologies, Inc. Disk drive with zero read offset in reserved area and method of making same
US6600636B1 (en) 1999-10-12 2003-07-29 Maxtor Corporation Magnetic head with write element offset from read element
KR20030064385A (ko) 2000-08-23 2003-07-31 시게이트 테크놀로지 엘엘씨 Ｐｅｓ 선형성에 기초하여 헤드를 제어하도록 트랙 스캔데이터를 사용하는 방법 및 장치
SG112803A1 (en) * 2000-09-27 2005-07-28 Seagate Technology Llc Writing servo sectors to a disc drive using offset heads
JP2003045134A (ja) * 2001-07-30 2003-02-14 Fujitsu Ltd ヘッド位置決め用信号の書き込み装置および書き込み方法
JP3987484B2 (ja) 2003-11-28 2007-10-10 株式会社東芝 磁気記録媒体、磁気記録装置およびオフセット量測定方法
US7430091B2 (en) * 2005-10-21 2008-09-30 Microsoft Corporation Method and apparatus for improving the performance of a disk drive
JP2012248254A (ja) 2011-05-30 2012-12-13 Toshiba Corp 磁気記録媒体、磁気記録装置
US11049517B1 (en) * 2020-04-17 2021-06-29 Western Digital Technologies, Inc. Data storage device staggering access operations to facilitate concurrent access of two disk surfaces

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5149013A (ja) * 1974-10-25 1976-04-27 Hitachi Ltd Ichigimehoshiki
JPS592087B2 (ja) * 1975-07-18 1984-01-17 日本電気株式会社 ジキヘツド
DE3009548A1 (de) * 1980-03-13 1981-09-24 Ibm Deutschland Gmbh, 7000 Stuttgart Spurnachlaufsteuerung fuer magnetkoepfe sowie verfahren zur kompensation gleichfoermiger stoergroessen
AU576947B2 (en) * 1985-03-08 1988-09-08 Sony Corporation Combination magnetic transducer head
JPS61206916A (ja) * 1985-03-11 1986-09-13 Sony Corp 磁気デイスク装置
US4642709A (en) * 1985-10-16 1987-02-10 International Business Machines Corporation Twin track vertical magnetic recording servo control method
US4833551A (en) * 1987-02-24 1989-05-23 Konishiroku Photo Industries Co., Ltd. Dual head servo system and method for a magnetic disk
JPS6476473A (en) * 1987-09-18 1989-03-22 Hitachi Ltd Positioning device

Also Published As

Publication number Publication date
EP0428325B1 (de) 1995-04-05
DE69018382D1 (de) 1995-05-11
US5073833A (en) 1991-12-17
EP0428325A2 (de) 1991-05-22
EP0428325A3 (en) 1992-01-15
JPH03160675A (ja) 1991-07-10
DE69018382T2 (de) 1995-10-12
JP2554393B2 (ja) 1996-11-13

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Legal Events

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

Effective date: 20091107