WO2011104050A3 - Synchronization of symmetric timing based servo bursts - Google Patents

Synchronization of symmetric timing based servo bursts Download PDF

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Publication number
WO2011104050A3
WO2011104050A3 PCT/EP2011/050674 EP2011050674W WO2011104050A3 WO 2011104050 A3 WO2011104050 A3 WO 2011104050A3 EP 2011050674 W EP2011050674 W EP 2011050674W WO 2011104050 A3 WO2011104050 A3 WO 2011104050A3
Authority
WO
WIPO (PCT)
Prior art keywords
servo
burst
frames
bursts
timing based
Prior art date
Application number
PCT/EP2011/050674
Other languages
French (fr)
Other versions
WO2011104050A2 (en
Inventor
Giovanni Cherubini
Jens Jelitto
Mark Alfred Lantz
Robert Allen Hutchins
Original Assignee
International Business Machines Corporation
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 International Business Machines Corporation filed Critical International Business Machines Corporation
Priority to KR1020127019281A priority Critical patent/KR101353308B1/en
Priority to JP2012554256A priority patent/JP5651197B2/en
Priority to CA2780235A priority patent/CA2780235C/en
Priority to EP11701075.1A priority patent/EP2539894B1/en
Priority to CN201180010675.9A priority patent/CN102770914B/en
Publication of WO2011104050A2 publication Critical patent/WO2011104050A2/en
Publication of WO2011104050A3 publication Critical patent/WO2011104050A3/en

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
    • 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
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording

Abstract

Timing based servo bursts of servo frames, in which the frames are arranged to be symmetric with the same number of servo stripes in each burst of a frame, are synchronized by shifting selected bits. For example, servo frames are arranged with four servo bursts with an equal number of servo stripes in each burst, the servo frames comprising two symmetric sub-frames, each sub-frame comprising two bursts of servo stripes that are parallel to each other within a burst, and the bursts are non-parallel with respect to each other; each servo burst is arranged to comprise at least one reference servo stripe; and each servo burst is arranged to comprise at least one shifted servo stripe, wherein the shift is in the same longitudinal direction with respect to at least one reference servo stripe for each burst of a frame and the opposite longitudinal direction for bursts of sequentially adjacent frames.
PCT/EP2011/050674 2010-02-24 2011-01-19 Synchronization of symmetric timing based servo bursts WO2011104050A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020127019281A KR101353308B1 (en) 2010-02-24 2011-01-19 Synchronization of symmetric timing based servo bursts
JP2012554256A JP5651197B2 (en) 2010-02-24 2011-01-19 Servo burst synchronization method and magnetic tape servo detection system
CA2780235A CA2780235C (en) 2010-02-24 2011-01-19 Synchronization of symmetric timing based servo bursts
EP11701075.1A EP2539894B1 (en) 2010-02-24 2011-01-19 Synchronization of symmetric timing based servo bursts
CN201180010675.9A CN102770914B (en) 2010-02-24 2011-01-19 The synchronous method of tape-servo write device and the servo burst based on symmetry timing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/712,039 2010-02-24
US12/712,039 US8054568B2 (en) 2010-02-24 2010-02-24 Synchronization of symmetric timing based servo bursts

Publications (2)

Publication Number Publication Date
WO2011104050A2 WO2011104050A2 (en) 2011-09-01
WO2011104050A3 true WO2011104050A3 (en) 2012-04-19

Family

ID=44476294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/050674 WO2011104050A2 (en) 2010-02-24 2011-01-19 Synchronization of symmetric timing based servo bursts

Country Status (7)

Country Link
US (1) US8054568B2 (en)
EP (1) EP2539894B1 (en)
JP (1) JP5651197B2 (en)
KR (1) KR101353308B1 (en)
CN (1) CN102770914B (en)
CA (1) CA2780235C (en)
WO (1) WO2011104050A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2518677A (en) 2013-09-30 2015-04-01 Ibm Tape storage medium
JP6902497B2 (en) 2018-05-28 2021-07-14 富士フイルム株式会社 Magnetic tape, magnetic tape manufacturing method, magnetic tape manufacturing equipment, and recording / playback system
US10832715B1 (en) * 2019-10-29 2020-11-10 International Business Machines Corporation Averaged slope timing-based-servo tape-creep detection
US11011198B1 (en) 2019-10-29 2021-05-18 International Business Machines Corporation Tape-creep detection via frequency domain data
US10930309B1 (en) 2019-10-29 2021-02-23 International Business Machines Corporation Tape-creep detection via trajectory and distortion angles
JPWO2021095720A1 (en) * 2019-11-12 2021-05-20
US11373682B2 (en) * 2020-08-27 2022-06-28 Western Digital Technologies, Inc. Data storage device reading data from magnetic tape in forward and reverse direction
US11295773B1 (en) * 2020-10-01 2022-04-05 Western Digital Technologies, Inc. Data storage device demodulating digital data based on number of servo stripes in servo frame
US11488625B2 (en) 2020-10-01 2022-11-01 Western Digital Technologies, Inc. Data storage device demodulating servo stripes using matched filter
US11386928B2 (en) 2020-10-01 2022-07-12 Western Digital Technologies, Inc. Data storage device demodulating servo stripes using matched filter
US11488626B2 (en) 2020-10-01 2022-11-01 Western Digital Technologies, Inc. Data storage device demodulating servo stripes using matched filter
CN115296784B (en) * 2022-08-10 2023-10-20 横川机器人（深圳）有限公司 Low-delay synchronization method for servo driver

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5689384A (en) * 1994-06-30 1997-11-18 International Business Machines Corporation Timing based servo system for magnetic tape systems
US20030151844A1 (en) * 2002-02-13 2003-08-14 International Business Machines Corporation Timing based servo with fixed distances between transitions
US20050057838A1 (en) * 2003-09-11 2005-03-17 Fuji Photo Film Co., Ltd. Magnetic tape and maufacturing method thereof, and servo writer and servo write method
US20050122615A1 (en) * 2003-12-01 2005-06-09 Fuji Photo Film Co., Ltd. Magnetic tape cartridge, servo writer, magnetic tape drive and method for reading servo signal
US20060114596A1 (en) * 2004-11-30 2006-06-01 International Business Machines Corporation Tri-state servowriter driver with slow return to zero
US20090040643A1 (en) * 2007-07-19 2009-02-12 Quantum Corporation Method and apparatus for writing timing based servo tracks on magnetic tape using complementary servo writer pairs

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105863A (en) 1976-12-20 1978-08-08 Bell Telephone Laboratories, Incorporated Arrangement for combining data symbols in accordance with a predetermined weighting function
US5448430A (en) 1993-08-05 1995-09-05 International Business Machines Corporation Track following servo demodulation
US6049438A (en) 1997-03-07 2000-04-11 International Business Machines Corporation Method and apparatus for encoding digital servo information in a servo burst
US5930065A (en) 1997-05-16 1999-07-27 International Business Machines Corporation Timing based servo longitudinal addressing
US6542325B1 (en) 1999-03-10 2003-04-01 Imation Corp. Time-based servo for magnetic storage media
US6278571B1 (en) * 1999-05-19 2001-08-21 International Business Machines Corporation Adaptive servo gap detection for timing based servo
US6239939B1 (en) 1999-08-09 2001-05-29 International Business Machines Corporation Robust detection of data modulated into a timing based servo
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
US7193800B2 (en) 2004-05-06 2007-03-20 Hitachi Global Storage Technologies Netherlands B.V. Data recording medium with servo pattern having pseudo-noise sequences
US7365929B2 (en) * 2006-07-30 2008-04-29 International Business Machines Corporation Synchronous servo channel for tape drive systems
JP4918407B2 (en) * 2007-05-21 2012-04-18 日立マクセル株式会社 Servo signal recording device
US7742254B2 (en) 2008-01-03 2010-06-22 International Business Machines Corporation Servo channel for tape drive systems
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
US7529061B2 (en) 2008-02-01 2009-05-05 International Business Machines Corporation Tape drive for maintaining lateral position utilizing longitudinally shifted servo pattern with increased sampling rate
US7684143B2 (en) * 2008-02-29 2010-03-23 International Business Machines Corporation Apparatus, system, and method for limiting frame spacing error during timing-based servo pattern fabrication
US20100079890A1 (en) * 2008-09-26 2010-04-01 Brummet Robert Allan Method and apparatus for encoding positioning information on a magnetic tape media

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5689384A (en) * 1994-06-30 1997-11-18 International Business Machines Corporation Timing based servo system for magnetic tape systems
US20030151844A1 (en) * 2002-02-13 2003-08-14 International Business Machines Corporation Timing based servo with fixed distances between transitions
US20050057838A1 (en) * 2003-09-11 2005-03-17 Fuji Photo Film Co., Ltd. Magnetic tape and maufacturing method thereof, and servo writer and servo write method
US20050122615A1 (en) * 2003-12-01 2005-06-09 Fuji Photo Film Co., Ltd. Magnetic tape cartridge, servo writer, magnetic tape drive and method for reading servo signal
US20060114596A1 (en) * 2004-11-30 2006-06-01 International Business Machines Corporation Tri-state servowriter driver with slow return to zero
US20090040643A1 (en) * 2007-07-19 2009-02-12 Quantum Corporation Method and apparatus for writing timing based servo tracks on magnetic tape using complementary servo writer pairs

Also Published As

Publication number Publication date
CA2780235C (en) 2018-05-29
US8054568B2 (en) 2011-11-08
EP2539894B1 (en) 2013-04-17
JP2013520762A (en) 2013-06-06
KR101353308B1 (en) 2014-01-23
WO2011104050A2 (en) 2011-09-01
CN102770914B (en) 2015-07-29
KR20120123359A (en) 2012-11-08
CA2780235A1 (en) 2011-09-01
EP2539894A2 (en) 2013-01-02
CN102770914A (en) 2012-11-07
US20110205657A1 (en) 2011-08-25
JP5651197B2 (en) 2015-01-07

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