DE112010002334B4 - Steuerungsverfahren und Vorrichtung für ein Dualkanal-gewichtetes LPOS-Kombinierungsschema - Google Patents

Steuerungsverfahren und Vorrichtung für ein Dualkanal-gewichtetes LPOS-Kombinierungsschema Download PDF

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Publication number
DE112010002334B4
DE112010002334B4 DE112010002334T DE112010002334T DE112010002334B4 DE 112010002334 B4 DE112010002334 B4 DE 112010002334B4 DE 112010002334 T DE112010002334 T DE 112010002334T DE 112010002334 T DE112010002334 T DE 112010002334T DE 112010002334 B4 DE112010002334 B4 DE 112010002334B4
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DE
Germany
Prior art keywords
servo
servo channel
channel
fsm
bit
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 - Fee Related
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DE112010002334T
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German (de)
English (en)
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DE112010002334T5 (de
Inventor
Jens Jelitto
Robert Allen Hutchins
Melanie Jean Sandberg
Giovanni Cherubini
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International Business Machines Corp
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International Business Machines Corp
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Publication of DE112010002334T5 publication Critical patent/DE112010002334T5/de
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Publication of DE112010002334B4 publication Critical patent/DE112010002334B4/de
Expired - Fee Related legal-status Critical Current
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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
    • G11B5/584—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 tapes
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than one track

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
DE112010002334T 2009-07-09 2010-06-02 Steuerungsverfahren und Vorrichtung für ein Dualkanal-gewichtetes LPOS-Kombinierungsschema Expired - Fee Related DE112010002334B4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/500,490 US8331055B2 (en) 2009-07-09 2009-07-09 Control method and apparatus for a dual-channel weighted LPOS combining scheme
US12/500,490 2009-07-09
PCT/EP2010/057678 WO2011003677A1 (en) 2009-07-09 2010-06-02 Control method and apparatus for a dual-channel weighted lpos combining scheme

Publications (2)

Publication Number Publication Date
DE112010002334T5 DE112010002334T5 (de) 2012-08-02
DE112010002334B4 true DE112010002334B4 (de) 2012-12-13

Family

ID=42342448

Family Applications (1)

Application Number Title Priority Date Filing Date
DE112010002334T Expired - Fee Related DE112010002334B4 (de) 2009-07-09 2010-06-02 Steuerungsverfahren und Vorrichtung für ein Dualkanal-gewichtetes LPOS-Kombinierungsschema

Country Status (7)

Country Link
US (1) US8331055B2 (enExample)
JP (1) JP5651173B2 (enExample)
CN (1) CN102473419B (enExample)
CA (1) CA2765148C (enExample)
DE (1) DE112010002334B4 (enExample)
GB (1) GB2484229B (enExample)
WO (1) WO2011003677A1 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8271857B2 (en) * 2008-05-13 2012-09-18 International Business Machines Corporation Correcting errors in longitudinal position (LPOS) words
US7961424B2 (en) * 2009-10-30 2011-06-14 International Business Machines Corporation Multilevel pulse position modulation for efficient encoding of information into servo patterns
EP2583999A1 (en) * 2011-10-20 2013-04-24 Basell Poliolefine Italia S.r.l. Polyolefin compositions
GB2501521A (en) 2012-04-27 2013-10-30 Ibm Skew compensation in tape storage device
GB2525222A (en) * 2014-04-16 2015-10-21 Ibm Method and apparatus for operating a tape storage device
CN114242118B (zh) * 2020-09-09 2025-08-22 马维尔亚洲私人有限公司 用于存储装置的双表面自伺服写入

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69220280T2 (de) * 1991-04-12 1998-01-22 Sharp Kk Aufbau zur Positionierung eines magnetischen Kopfes
US6724561B1 (en) * 2000-06-28 2004-04-20 Storage Technology Corporation Apparatus and method for compensating for environmental effects on media
US20050078398A1 (en) * 2003-10-10 2005-04-14 International Business Machines Corporation Apparatus and method to read information from a tape storage medium
US20060114596A1 (en) * 2004-11-30 2006-06-01 International Business Machines Corporation Tri-state servowriter driver with slow return to zero
EP1984919B1 (en) * 2006-01-26 2009-08-05 International Business Machines Corporation Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448430A (en) * 1993-08-05 1995-09-05 International Business Machines Corporation Track following servo demodulation
US5909336A (en) * 1997-02-18 1999-06-01 Texas Instruments Incorporated Position detection scheme for headerless disk controller
US5930065A (en) * 1997-05-16 1999-07-27 International Business Machines Corporation Timing based servo longitudinal addressing
JP2001250346A (ja) * 2000-03-06 2001-09-14 Fujitsu Ltd 磁気テープ装置
US6580581B1 (en) * 2000-08-16 2003-06-17 International Business Machines Corporation Recovery of lateral position of a servo system with respect to longitudinal servo bands of a magnetic tape
US6791781B2 (en) * 2001-07-17 2004-09-14 International Business Machines Corporation Method and apparatus for providing linear position (LPOS) estimations
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
US7130140B1 (en) * 2002-05-06 2006-10-31 Storage Technology Corporation Polarity encoded pattern for timing based servo
US6937413B2 (en) * 2003-08-08 2005-08-30 International Business Machines Corporation Tape servo information with superimposed data information providing servo band identification
US6992857B2 (en) * 2004-02-02 2006-01-31 Hewlett-Packard Development Company, L.P. Weighting servo signals for head positioning
US7196859B2 (en) * 2004-07-09 2007-03-27 Imation Corp. Processing techniques for time-based servo patterns
US7433142B2 (en) * 2006-02-01 2008-10-07 International Business Machines Corporation Using at least one servo channel to provide timing recovery and timing information to data channels
US7365929B2 (en) * 2006-07-30 2008-04-29 International Business Machines Corporation Synchronous servo channel for tape drive systems
US7605992B2 (en) * 2008-01-28 2009-10-20 International Business Machines Corporation Robust LPOS detection with predictor and bit verifier
US7903368B2 (en) * 2008-02-01 2011-03-08 International Business Machines Corporation Tape cartridge having tape media with longitudinally shifted servo pattern for increased sampling rate
US7990644B2 (en) * 2008-02-29 2011-08-02 International Business Machines Corporation Apparatus and method to decode linear position information encoded in a sequential information storage medium
US7924520B2 (en) * 2008-10-01 2011-04-12 Hewlett-Packard Development Company, L.P. Method and apparatus for determining position of a storage medium
US7982988B2 (en) * 2009-03-09 2011-07-19 International Business Machines Corporation Combining information from parallel servo channels
US7839599B2 (en) * 2009-03-09 2010-11-23 International Business Machines Corporation Combining information from parallel servo channels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69220280T2 (de) * 1991-04-12 1998-01-22 Sharp Kk Aufbau zur Positionierung eines magnetischen Kopfes
US6724561B1 (en) * 2000-06-28 2004-04-20 Storage Technology Corporation Apparatus and method for compensating for environmental effects on media
US20050078398A1 (en) * 2003-10-10 2005-04-14 International Business Machines Corporation Apparatus and method to read information from a tape storage medium
US20060114596A1 (en) * 2004-11-30 2006-06-01 International Business Machines Corporation Tri-state servowriter driver with slow return to zero
EP1984919B1 (en) * 2006-01-26 2009-08-05 International Business Machines Corporation Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems

Also Published As

Publication number Publication date
US20110007413A1 (en) 2011-01-13
JP2012532401A (ja) 2012-12-13
GB201200295D0 (en) 2012-02-22
CN102473419B (zh) 2015-07-22
CN102473419A (zh) 2012-05-23
JP5651173B2 (ja) 2015-01-07
US8331055B2 (en) 2012-12-11
CA2765148A1 (en) 2011-01-13
GB2484229A (en) 2012-04-04
CA2765148C (en) 2017-09-19
DE112010002334T5 (de) 2012-08-02
GB2484229B (en) 2016-09-07
WO2011003677A1 (en) 2011-01-13

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