DE69824668D1 - Redundantes Servosystem - Google Patents

Redundantes Servosystem

Info

Publication number
DE69824668D1
DE69824668D1 DE69824668T DE69824668T DE69824668D1 DE 69824668 D1 DE69824668 D1 DE 69824668D1 DE 69824668 T DE69824668 T DE 69824668T DE 69824668 T DE69824668 T DE 69824668T DE 69824668 D1 DE69824668 D1 DE 69824668D1
Authority
DE
Germany
Prior art keywords
servo system
redundant servo
redundant
servo
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE69824668T
Other languages
English (en)
Other versions
DE69824668T2 (de
Inventor
Vernon L Knowles
Donald J Fasen
Richard D Barndt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of DE69824668D1 publication Critical patent/DE69824668D1/de
Application granted granted Critical
Publication of DE69824668T2 publication Critical patent/DE69824668T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/087Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing recorded signals
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/005Programmed access in sequence to indexed parts of tracks of operating tapes, by driving or guiding the tape
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/02Driving or moving of heads
    • G11B21/08Track changing or selecting during transducing operation
    • G11B21/081Access to indexed tracks or parts of continuous track
    • G11B21/086Access to indexed tracks or parts of continuous track on tapes
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/488Disposition of heads
    • G11B5/4893Disposition of heads relative to moving tape
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5504Track change, selection or acquisition by displacement of the head across tape tracks
    • G11B5/5508Control circuits therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • G11B5/584Disposition 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 tapes
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • G11B5/00817Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on longitudinal tracks only, e.g. for serpentine format recording
DE69824668T 1997-06-05 1998-01-19 Redundantes Servosystem Expired - Lifetime DE69824668T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US869649 1997-06-05
US08/869,649 US5982711A (en) 1997-06-05 1997-06-05 Device for reading data from or writing data to magnetic storage media and a method of positioning a tape head relative to the magnetic storage media

Publications (2)

Publication Number Publication Date
DE69824668D1 true DE69824668D1 (de) 2004-07-29
DE69824668T2 DE69824668T2 (de) 2005-07-21

Family

ID=25353998

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69824668T Expired - Lifetime DE69824668T2 (de) 1997-06-05 1998-01-19 Redundantes Servosystem

Country Status (4)

Country Link
US (1) US5982711A (de)
EP (1) EP0883110B1 (de)
JP (1) JPH117620A (de)
DE (1) DE69824668T2 (de)

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JP3797447B2 (ja) * 1997-04-08 2006-07-19 パイオニア株式会社 情報記録再生装置
US6172837B1 (en) * 1998-03-23 2001-01-09 Hewlett-Packard Company Postponable servo code selection
US6222698B1 (en) * 1998-05-22 2001-04-24 Hewlett-Packard Company Magnetic tape dimensional instability compensation by varying recording head azimuth angle
US6496328B1 (en) 1999-12-30 2002-12-17 Advanced Research Corporation Low inductance, ferrite sub-gap substrate structure for surface film magnetic recording heads
US6563659B1 (en) 2000-03-08 2003-05-13 Hewlett-Packard Development Company, L.P. Method and apparatus for servo code based tape tension measurement
US6721126B1 (en) 2000-08-16 2004-04-13 International Business Machines Corporation Position identification for a coarse actuator portion of a compound actuator
US6771456B2 (en) * 2001-05-31 2004-08-03 International Business Machines Corporation System and method for miniaturization of read/write heads
JP3830088B2 (ja) * 2001-11-29 2006-10-04 富士写真フイルム株式会社 サーボ制御方法、磁気テープ、及び磁気テープ記録再生装置
US6970314B2 (en) * 2002-06-05 2005-11-29 Storage Technology Corporation Multiple section read/write head for high track density, flexible media storage applications
JP2004145948A (ja) * 2002-10-23 2004-05-20 Fuji Photo Film Co Ltd 磁気テープドライブ
US6947247B2 (en) 2003-03-05 2005-09-20 Advanced Research Corporation Large angle azimuth recording and head configurations
JP4157412B2 (ja) * 2003-04-15 2008-10-01 富士フイルム株式会社 磁気テープおよびその製造方法、サーボライタ、ならびにサーボバンドの識別方法および装置
US7106544B2 (en) * 2003-05-09 2006-09-12 Advanced Research Corporation Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape
US6937425B2 (en) * 2003-06-18 2005-08-30 Hewlett-Packard Development Company, L.P. Head-track alignment
US7239465B1 (en) * 2003-06-30 2007-07-03 Storage Technology Corporation Multiple section head assembly for dual azimuth recording
US7193812B2 (en) 2003-07-25 2007-03-20 International Business Machines Corporation Recording head compensation for tape shrinkage and expansion
US6999268B2 (en) * 2003-08-12 2006-02-14 Hewlett-Packard Development Company, L.P. Method and system of a head for a storage media
US7102845B2 (en) * 2003-10-20 2006-09-05 Quantum Corporation Servo methods and systems using existing data structures and medium edge position
US7149050B2 (en) * 2003-10-20 2006-12-12 Quantum Corporation Diffractive position sensors and control systems
US7116514B2 (en) * 2003-10-20 2006-10-03 Quantum Corporation Methods and systems for magnetic recording
US7136255B2 (en) 2003-10-20 2006-11-14 Quantum Corporation Servo methods and systems using masked medium edge position sensors
US7139152B2 (en) * 2003-10-20 2006-11-21 Quantum Corporation Servo methods and systems using existing data structures and optical masks
US8144424B2 (en) 2003-12-19 2012-03-27 Dugas Matthew P Timing-based servo verify head and magnetic media made therewith
US7450341B2 (en) 2004-05-04 2008-11-11 Advanced Research Corporation Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same
JP2005327386A (ja) * 2004-05-14 2005-11-24 Fuji Photo Film Co Ltd 磁気記録媒体、サーボ信号書込ヘッドユニット及びサーボライタ
US7184233B2 (en) * 2004-06-04 2007-02-27 Quantum Corporation Dual source tracking servo systems and associated methods
US7573664B2 (en) * 2004-12-03 2009-08-11 International Business Machines Corporation Integrated multiple channel data reliability testing for a magnetic tape drive
US7564656B2 (en) * 2005-02-28 2009-07-21 Hitachi Global Storage Technologies Netherlands B.V. Integrated servo and read EMR sensor
US7499235B2 (en) 2005-03-18 2009-03-03 Quantum Corporation Auto-servo tape system and associated recording head
US7307809B2 (en) * 2005-08-18 2007-12-11 Quantum Corporation Correlation servo for positioning recording head
US9740552B2 (en) * 2006-02-10 2017-08-22 Percept Technologies Inc. Method and system for error correction utilized with a system for distribution of media
US8566894B2 (en) * 2006-02-10 2013-10-22 Scott W. Lewis Method and system for distribution of media
US8451850B2 (en) * 2006-02-10 2013-05-28 Scott W. Lewis Method and system for distribution of media including a gigablock
US20070192819A1 (en) * 2006-02-10 2007-08-16 Lewis Scott W System for distribution of media utilized with a receiver/set top box
US7436621B2 (en) * 2006-06-08 2008-10-14 Quantum Corporation Azimuth compensation using combination bump pes detection
US7333291B1 (en) 2006-09-28 2008-02-19 Hewlett-Packard Development Company, L.P. System and method for reducing tracking noise in a tape drive
US7826169B2 (en) 2007-04-25 2010-11-02 Quantum Corporation Servo error detection and compensation utilizing virtual data tracking servo methods
JP2009123288A (ja) * 2007-11-15 2009-06-04 Tdk Corp ヘッド装置、ドライブ装置およびトラッキング方法
US20090174963A1 (en) * 2008-01-03 2009-07-09 Jason Liang Tape-based data storage system and head enabling compounded reading rate
US8068300B2 (en) 2008-03-28 2011-11-29 Advanced Research Corporation Thin film planar arbitrary gap pattern magnetic head
US7623318B1 (en) * 2008-06-19 2009-11-24 International Business Machines Corporation Noise reduction in same-gap servo in frequency-based servo tape systems
WO2011014836A2 (en) 2009-07-31 2011-02-03 Advanced Research Corporation Erase drive systems and methods of erasure for tape data cartridge
US7961421B1 (en) * 2010-03-02 2011-06-14 International Business Machines Corporation Servo band identification and initial skew estimation in drives having flangeless rollers and systems thereof
US8638523B2 (en) * 2012-07-02 2014-01-28 International Business Machines Corporation Enabling partial write during a tape skew
US10008226B1 (en) 2017-06-28 2018-06-26 International Business Machines Corporation Dynamic head offset selection for tape drive
JP7080844B2 (ja) * 2019-03-19 2022-06-06 株式会社東芝 磁気ディスク装置、及びサーボ復調位置の復調方法
US10902873B1 (en) * 2019-09-21 2021-01-26 International Business Machines Corporation Apparatus with multi-channel tape head module having controllable expansion elements
US11295772B1 (en) * 2020-11-14 2022-04-05 Western Digital Technologies, Inc. Data storage device compensating for tape distortion

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US5008765A (en) * 1989-01-17 1991-04-16 Minnesota Mining And Manufacturing Company Method and apparatus for reading or writing on tape using a servo positioned multiple channel head
US5262908A (en) * 1990-02-20 1993-11-16 Sharp Kabushiki Kaisha Tracking control device for magnetic recording/reproducing apparatus
US5523904A (en) * 1992-06-24 1996-06-04 Quantum Corporation Linear tape write servo using embedded azimuth servo blocks
US5450257A (en) * 1993-03-23 1995-09-12 Minnesota Mining And Manufacturing Company Head-tape alignment system and method
US5574602A (en) * 1993-06-14 1996-11-12 International Business Machines Corporation Processing servo signals concurrently read from plural spaced-apart servo areas for a magnetic tape having serpentine data track scanning
US5432652A (en) * 1993-06-14 1995-07-11 International Business Machines Corporation Servo and data format for magnetic tape having plural spaced-apart servo areas interleaved with data track areas having serpentine track scanning using any one of a plurality of number of concurrently accessed tracks
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US5488525A (en) * 1994-08-18 1996-01-30 International Business Machines Corporation Decoupled magnetic head assembly for quarter-inch tape
US5572392A (en) * 1994-11-17 1996-11-05 International Business Machines Corporation Arbitrary pattern write head assembly for writing timing-based servo patterns on magnetic storage media
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Also Published As

Publication number Publication date
EP0883110A2 (de) 1998-12-09
JPH117620A (ja) 1999-01-12
EP0883110A3 (de) 2000-12-20
US5982711A (en) 1999-11-09
DE69824668T2 (de) 2005-07-21
EP0883110B1 (de) 2004-06-23

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE

8364 No opposition during term of opposition