CN102473419B - 双通道加权的lpos组合方案的控制方法和装置 - Google Patents

双通道加权的lpos组合方案的控制方法和装置 Download PDF

Info

Publication number
CN102473419B
CN102473419B CN201080030677.XA CN201080030677A CN102473419B CN 102473419 B CN102473419 B CN 102473419B CN 201080030677 A CN201080030677 A CN 201080030677A CN 102473419 B CN102473419 B CN 102473419B
Authority
CN
China
Prior art keywords
servo
channel
asserted
lpos
fsm
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
Application number
CN201080030677.XA
Other languages
English (en)
Chinese (zh)
Other versions
CN102473419A (zh
Inventor
J·杰里托
G·谢吕比尼
R·A·哈特金斯
M·J·桑德伯格
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 Corp filed Critical International Business Machines Corp
Publication of CN102473419A publication Critical patent/CN102473419A/zh
Application granted granted Critical
Publication of CN102473419B publication Critical patent/CN102473419B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G11B5/584—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)
CN201080030677.XA 2009-07-09 2010-06-02 双通道加权的lpos组合方案的控制方法和装置 Expired - Fee Related CN102473419B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/500,490 2009-07-09
US12/500,490 US8331055B2 (en) 2009-07-09 2009-07-09 Control method and apparatus for a dual-channel weighted LPOS combining scheme
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
CN102473419A CN102473419A (zh) 2012-05-23
CN102473419B true CN102473419B (zh) 2015-07-22

Family

ID=42342448

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201080030677.XA Expired - Fee Related CN102473419B (zh) 2009-07-09 2010-06-02 双通道加权的lpos组合方案的控制方法和装置

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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101114462A (zh) * 2006-07-30 2008-01-30 国际商业机器公司 同步伺服通道及其操作方法

Family Cites Families (23)

* 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
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
US6724561B1 (en) * 2000-06-28 2004-04-20 Storage Technology Corporation Apparatus and method for compensating for environmental effects on media
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
US6987633B2 (en) * 2003-10-10 2006-01-17 International Business Machines Corporation Apparatus and method to read information from a tape storage medium
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
US7280294B2 (en) * 2004-11-30 2007-10-09 International Business Machines Corporation Tri-state servowriter driver with slow return to zero
US7245450B1 (en) * 2006-01-26 2007-07-17 International Business Machines Corporation Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems
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
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101114462A (zh) * 2006-07-30 2008-01-30 国际商业机器公司 同步伺服通道及其操作方法

Also Published As

Publication number Publication date
US20110007413A1 (en) 2011-01-13
GB201200295D0 (en) 2012-02-22
JP5651173B2 (ja) 2015-01-07
GB2484229A (en) 2012-04-04
DE112010002334B4 (de) 2012-12-13
GB2484229B (en) 2016-09-07
DE112010002334T5 (de) 2012-08-02
US8331055B2 (en) 2012-12-11
JP2012532401A (ja) 2012-12-13
CA2765148A1 (en) 2011-01-13
WO2011003677A1 (en) 2011-01-13
CN102473419A (zh) 2012-05-23
CA2765148C (en) 2017-09-19

Similar Documents

Publication Publication Date Title
CN102473419B (zh) 双通道加权的lpos组合方案的控制方法和装置
KR100278433B1 (ko) 트랙 추종 서보 정보에 중첩된 어드레싱 정보를 갖는 자기 테이프 매체 및 그 판독, 기록 방법
US4454549A (en) Slant track sector servo
US20120281304A1 (en) Systems and Methods for Read Head Characterization
US9361928B2 (en) Dynamically controlling tape velocity
US8611039B2 (en) Arrangement and processing of longitudinal position information on a data storage medium
US20090002866A1 (en) Adjustment of read/write clock edge timing
US9424877B2 (en) Variable stopwrite threshold
JP2013521592A (ja) タイミング・ベースのサーボ・バンド内でタイミングを計測する方法
US20040128422A1 (en) Storage device implementing multiple interfaces using a single ASIC
US8169736B2 (en) Method and apparatus to position a head module comprising servo elements and a plurality of data elements
US6069572A (en) Apparatus and method to encode position information data on a recording medium
US20100177435A1 (en) Servo pattern architecture to uncouple position error determination from linear position information
CN1983390B (zh) 在磁性存储介质上编码伺服位置信息的方法和伺服写磁头
US8289643B2 (en) Phase calibration system for disk drives
GB2279491A (en) A magnetic disk drive
US8054569B2 (en) Method and apparatus to identify a data band encoded between two servo bands in a sequential information storage medium
JP4232734B2 (ja) サーボ信号の周波数変調装置、周波数変調方法及び磁気記録装置
GB2413682A (en) Tape early warning end of medium detection
CN1099899A (zh) 磁盘和磁盘驱动系统
CA1056498A (en) Method and apparatus for inserting data records on magnetic tape
US8908306B1 (en) Disk drive measuring channel transition response by averaging isolated transitions in a read signal
Cherubini et al. LPOS symbol detection by soft-output combining of dual synchronous servo channels in tape drives
JP2006147096A (ja) 磁気ディスク媒体、磁気ディスク装置、及び磁気ディスク媒体の回転位置検出方法
KR20060065229A (ko) 하드디스크 드라이브의 서보 정보 검사 방법 그리고 이에적합한 기록 매체

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150722

CF01 Termination of patent right due to non-payment of annual fee