DE3854924T2 - Servomuster - Google Patents

Servomuster

Info

Publication number
DE3854924T2
DE3854924T2 DE3854924T DE3854924T DE3854924T2 DE 3854924 T2 DE3854924 T2 DE 3854924T2 DE 3854924 T DE3854924 T DE 3854924T DE 3854924 T DE3854924 T DE 3854924T DE 3854924 T2 DE3854924 T2 DE 3854924T2
Authority
DE
Germany
Prior art keywords
servo
disk
track
lines
present
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
DE3854924T
Other languages
English (en)
Other versions
DE3854924D1 (de
Inventor
John Bizjak
Leonard Shenfield
Scott Miller
Philip Kenny
William Benson
Michael Behr
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.)
BRIER TECHNOLOGY
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
Publication of DE3854924D1 publication Critical patent/DE3854924D1/de
Application granted granted Critical
Publication of DE3854924T2 publication Critical patent/DE3854924T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
DE3854924T 1987-10-30 1988-10-28 Servomuster Expired - Fee Related DE3854924T2 (de)

Applications Claiming Priority (2)

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
PCT/US1988/003837 WO1989004040A1 (en) 1987-10-30 1988-10-28 Servo pattern

Publications (2)

Publication Number Publication Date
DE3854924D1 DE3854924D1 (de) 1996-02-29
DE3854924T2 true DE3854924T2 (de) 1996-09-05

Family

ID=22365276

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3854924T Expired - Fee Related DE3854924T2 (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
US5132861A (en) * 1989-10-02 1992-07-21 Behr Michael I Systems using superimposed, orthogonal buried servo signals
US5223994A (en) * 1989-10-02 1993-06-29 Behr Michael I System 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
US6754022B1 (en) 2001-07-16 2004-06-22 Imation Corp. High-speed current driver
US6781778B1 (en) * 2001-07-16 2004-08-24 Imation Corp. Time-based sectored servo data format
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 (10)

* 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

Also Published As

Publication number Publication date
ATE133287T1 (de) 1996-02-15
EP0393116A4 (en) 1991-01-30
DE3854924D1 (de) 1996-02-29
EP0393116B1 (de) 1996-01-17
JP2652895B2 (ja) 1997-09-10
WO1989004040A1 (en) 1989-05-05
US5003412A (en) 1991-03-26
AU2811089A (en) 1989-05-23
EP0393116A1 (de) 1990-10-24
JPH03503582A (ja) 1991-08-08

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee