ATE133287T1 - Servomuster - Google Patents

Servomuster

Info

Publication number
ATE133287T1
ATE133287T1 AT89900444T AT89900444T ATE133287T1 AT E133287 T1 ATE133287 T1 AT E133287T1 AT 89900444 T AT89900444 T AT 89900444T AT 89900444 T AT89900444 T AT 89900444T AT E133287 T1 ATE133287 T1 AT E133287T1
Authority
AT
Austria
Prior art keywords
servo
disk
track
lines
present
Prior art date
Application number
AT89900444T
Other languages
English (en)
Inventor
John F Bizjak
Leonard Roy Shenfield
Scott D Miller
Philip C Kenny
William Benson
Michael I Behr
Original Assignee
Brier Technology
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 Brier Technology filed Critical Brier Technology
Application granted granted Critical
Publication of ATE133287T1 publication Critical patent/ATE133287T1/de

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
    • G11B5/5965—Embedded servo format
    • 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
    • G11B5/54—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 into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553—Details
    • G11B5/5534—Initialisation, calibration, e.g. cylinder "set-up"
    • 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
    • G11B5/59661—Spiral servo format

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Electric Motors In General (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
AT89900444T 1987-10-30 1988-10-28 Servomuster ATE133287T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/116,109 US5003412A (en) 1987-10-30 1987-10-30 Method and apparatus for positioning a read/write mechanism

Publications (1)

Publication Number Publication Date
ATE133287T1 true ATE133287T1 (de) 1996-02-15

Family

ID=22365276

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89900444T ATE133287T1 (de) 1987-10-30 1988-10-28 Servomuster

Country Status (7)

Country Link
US (1) US5003412A (de)
EP (1) EP0393116B1 (de)
JP (1) JP2652895B2 (de)
AT (1) ATE133287T1 (de)
AU (1) AU2811089A (de)
DE (1) DE3854924T2 (de)
WO (1) WO1989004040A1 (de)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5055951A (en) * 1989-03-10 1991-10-08 Irwin Magnetic Systems, Inc. Method and apparatus for servo-positioning movable transducer heads
US5223994A (en) * 1989-10-02 1993-06-29 Behr Michael I System using superimposed, orthogonal buried servo signals
US5132861A (en) * 1989-10-02 1992-07-21 Behr Michael I Systems using superimposed, orthogonal buried servo signals
JP2635912B2 (ja) * 1993-07-19 1997-07-30 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 磁気ヘッドの位置検出方法及び磁気ディスク装置
US5689384A (en) * 1994-06-30 1997-11-18 International Business Machines Corporation Timing based servo system for magnetic tape systems
US5612833A (en) * 1994-12-02 1997-03-18 International Business Machines Corporation Radial self-propagation pattern generation for disk file servowriting
US5680587A (en) * 1995-05-01 1997-10-21 Computer Performance Inc. Enhanced-performance floppy diskette subsystem
US5764018A (en) * 1995-09-29 1998-06-09 Hewlett-Packard Co. Hysteresis removal for positioning systems with variable backlash and stiction
US5875064A (en) 1996-07-09 1999-02-23 International Business Machines Corporation Method and system for accurate self-servowriting with normalization in a disk drive
US5793554A (en) * 1996-07-09 1998-08-11 International Business Machines Corporation Self-servowriting system with dynamic error propagation reduction
US5930065A (en) * 1997-05-16 1999-07-27 International Business Machines Corporation Timing based servo longitudinal addressing
US5923272A (en) * 1997-07-08 1999-07-13 International Business Machines Corporation Serial bitstream code for timing-based servo
US6304398B1 (en) 1998-09-24 2001-10-16 Seagate Technology Llc Dual modulo gray code positioning system
US6411459B1 (en) 1999-02-22 2002-06-25 Seagate Technology Llc Advanced servo writing method for hard disc drives
US6542325B1 (en) * 1999-03-10 2003-04-01 Imation Corp. Time-based servo for magnetic storage media
US7139144B1 (en) 2000-08-04 2006-11-21 Maxtor Corporation Method and apparatus for writing spiral servo information by modifying existing servo track writing equipment
US7133239B1 (en) 2000-05-09 2006-11-07 Maxtor Corporation Methods and apparatuses for writing spiral servo patterns onto a disk surface
US7167333B1 (en) 2000-05-09 2007-01-23 Maxtor Corporation Method and apparatus for writing and reading servo information written in a spiral fashion
US6781778B1 (en) 2001-07-16 2004-08-24 Imation Corp. Time-based sectored servo data format
US6754022B1 (en) 2001-07-16 2004-06-22 Imation Corp. High-speed current driver
US7072133B1 (en) 2001-10-15 2006-07-04 Imation Corp. Servo mark verify head
US6639529B1 (en) * 2002-05-14 2003-10-28 Mitutoyo Corporation System and method for delay calibration in position encoders
US7623313B1 (en) 2003-06-02 2009-11-24 Maxtor Corporation Method and apparatus for performing a self-servo write operation in a disk drive
US7248427B1 (en) 2003-06-02 2007-07-24 Maxtor Corporagion Method and apparatus for reducing velocity errors when writing spiral servo information onto a disk surface
US7206170B2 (en) * 2004-05-19 2007-04-17 Imetion Corp. Thin film servo head apparatus with canted servo gaps
US7124654B1 (en) 2004-09-30 2006-10-24 Western Digital (Fremont), Inc. Method for determining a microactuator range of movement
US20070047420A1 (en) * 2005-08-25 2007-03-01 Fuji Photo Film Co., Ltd. Optical information recording medium, optical information recording method and optical information reproducing method
US7760465B2 (en) * 2005-10-25 2010-07-20 International Business Machines Corporation Magnetic head having selectively defined reader gap thicknesses
US7474492B2 (en) * 2006-05-22 2009-01-06 Maxtor Corporation Mechanical reference detection using a v-shaped pattern
US20080144211A1 (en) * 2006-12-18 2008-06-19 Weber Mark P Servo techniques that mitigate an effect of read and write velocity variations on position error signal calculations
US7495859B2 (en) * 2007-02-20 2009-02-24 Imation Corp. Interleaved servo pattern
US7826169B2 (en) * 2007-04-25 2010-11-02 Quantum Corporation Servo error detection and compensation utilizing virtual data tracking servo methods
US7650686B2 (en) 2007-12-28 2010-01-26 Hitachi Global Storage Technologies Netherlands B.V. Servo track writer clockhead radius jig

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212074A (en) * 1960-12-15 1965-10-12 Sperry Rand Corp Magnetic disc file positional information apparatus
US3175205A (en) * 1961-06-13 1965-03-23 Ibm Data tracking system
US3426337A (en) * 1964-12-21 1969-02-04 Ibm Positioning system for random access device
US4007493A (en) * 1975-05-06 1977-02-08 Burroughs Corporation Track positioning system for magnetic transducer head
GB1474892A (en) 1975-06-27 1977-05-25 Burroughs Corp Method and apparatus for recording and reproducing information on a plural-track record disc
US4157577A (en) * 1977-11-14 1979-06-05 International Business Machines Corporation Rotatable storage apparatus with digitally responsive circuitry for track selection
US4371960A (en) * 1980-12-24 1983-02-01 Magnetic Peripherals Inc. Measurement of disc servo head/data head misalignment
US4587579A (en) * 1982-12-30 1986-05-06 International Business Machines Corporation System for position detection on a rotating disk
US4531167A (en) * 1983-08-25 1985-07-23 Pioneer Research, Inc. Servowriter system for magnetic disc drives
US4700244A (en) * 1986-02-14 1987-10-13 Hewlett-Packard Company Process and system for compensating for information shifts on disc storage media
JP5718265B2 (ja) 2012-03-27 2015-05-13 ルネサスエレクトロニクス株式会社 半導体装置および半導体装置の製造方法

Also Published As

Publication number Publication date
DE3854924T2 (de) 1996-09-05
EP0393116A1 (de) 1990-10-24
JPH03503582A (ja) 1991-08-08
DE3854924D1 (de) 1996-02-29
EP0393116B1 (de) 1996-01-17
JP2652895B2 (ja) 1997-09-10
AU2811089A (en) 1989-05-23
WO1989004040A1 (en) 1989-05-05
US5003412A (en) 1991-03-26
EP0393116A4 (en) 1991-01-30

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