DE3374728D1 - Track following buried servo system in a magnetic disk file - Google Patents

Track following buried servo system in a magnetic disk file

Info

Publication number
DE3374728D1
DE3374728D1 DE8383109318T DE3374728T DE3374728D1 DE 3374728 D1 DE3374728 D1 DE 3374728D1 DE 8383109318 T DE8383109318 T DE 8383109318T DE 3374728 T DE3374728 T DE 3374728T DE 3374728 D1 DE3374728 D1 DE 3374728D1
Authority
DE
Germany
Prior art keywords
magnetic disk
servo system
disk file
track following
buried servo
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
Application number
DE8383109318T
Other languages
English (en)
Inventor
Neils Hyrum Hansen
Munro King Haynes
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
Application granted granted Critical
Publication of DE3374728D1 publication Critical patent/DE3374728D1/de
Expired 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
DE8383109318T 1982-11-01 1983-09-20 Track following buried servo system in a magnetic disk file Expired DE3374728D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/438,218 US4488188A (en) 1982-11-01 1982-11-01 Buried servo recording system using phase encoded servo pattern

Publications (1)

Publication Number Publication Date
DE3374728D1 true DE3374728D1 (en) 1988-01-07

Family

ID=23739735

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383109318T Expired DE3374728D1 (en) 1982-11-01 1983-09-20 Track following buried servo system in a magnetic disk file

Country Status (4)

Country Link
US (1) US4488188A (de)
EP (1) EP0108224B1 (de)
JP (1) JPS5984383A (de)
DE (1) DE3374728D1 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549232A (en) * 1983-06-27 1985-10-22 International Business Machines Corporation Phase modulated servo system
US4878211A (en) * 1986-05-26 1989-10-31 Pioneer Electronic Corporation Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation
US4951162A (en) * 1986-11-06 1990-08-21 Canon Kabushiki Kaisha Tracking control system with pilot signal phase setting circuitry
DE3706159A1 (de) * 1987-02-26 1988-09-08 Thomson Brandt Gmbh Verfahren zur spurfindung bei einem aufzeichnungsgeraet
US5245487A (en) * 1989-01-27 1993-09-14 International Business Machines Corporation Transducer head for rigid disk drive
US5319502A (en) * 1992-01-10 1994-06-07 International Business Machines Corporation System and method for employing buried servos within a magnetic recording medium
US5615065A (en) * 1994-10-04 1997-03-25 International Business Machines Corporation Phase-compensated servo pattern and position error-sensing detector
US5600506A (en) * 1995-05-10 1997-02-04 Conner Peripherals, Inc. Apparatus and method for determining the position of a transducer relative to a disk surface in a disk drive system
US5801895A (en) * 1996-05-28 1998-09-01 Hewlett Packard Company Disk drive servo demodulation system which suppresses noise on the position error signal
US6025970A (en) * 1997-08-07 2000-02-15 International Business Machines Corporation Digital demodulation of a complementary two-frequency servo PES pattern
US5966264A (en) * 1997-08-07 1999-10-12 International Business Machines Cororation Two frequency servo PES pattern
US6496328B1 (en) 1999-12-30 2002-12-17 Advanced Research Corporation Low inductance, ferrite sub-gap substrate structure for surface film magnetic recording heads
US7106544B2 (en) * 2003-05-09 2006-09-12 Advanced Research Corporation Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape
US8144424B2 (en) 2003-12-19 2012-03-27 Dugas Matthew P Timing-based servo verify head and magnetic media made therewith
JP2007536683A (ja) 2004-05-04 2007-12-13 アドバンスト・リサーチ・コーポレーション 任意形状のギャップ・パターンのための集積型薄膜サブギャップ／サブ磁極構造、磁気記録ヘッド、及びその製造方法
US7209314B2 (en) * 2005-06-09 2007-04-24 Hitachi Global Storage Technologies Netherlands B.V. Disk drive with phase-quadrature servo pattern and demodulated position error signal insensitive to timing and phase-misalignment errors
US8068300B2 (en) 2008-03-28 2011-11-29 Advanced Research Corporation Thin film planar arbitrary gap pattern magnetic head
WO2011014836A2 (en) 2009-07-31 2011-02-03 Advanced Research Corporation Erase drive systems and methods of erasure for tape data cartridge
US8922926B2 (en) 2011-11-21 2014-12-30 Agency for Science, Technology Research Data recording medium and method for generating a reference clock signal
US9336829B2 (en) 2011-11-21 2016-05-10 Marvell International Ltd. Data recording medium, method for generating a reference clock signal, and data storage device
GB2503483A (en) 2012-06-28 2014-01-01 Ibm Magnetic tape servo patterns and servo write head
US9070410B2 (en) 2012-07-20 2015-06-30 Marvell International Ltd. Recording media, data storage devices, and methods for determining a position error signal in a recording medium

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE640044A (de) * 1962-11-30 1964-03-16
US3427606A (en) * 1966-03-02 1969-02-11 Ibm Memory system
BE794737A (fr) * 1972-02-18 1973-05-16 Ibm Systemes d'enregistrement de signaux digitaux
US3821798A (en) * 1972-02-18 1974-06-28 Ibm Resynchronizable recording system
US3956769A (en) * 1974-08-12 1976-05-11 Control Data Corporation Recording system having coinciding servo and data tracks
US4213148A (en) * 1978-09-01 1980-07-15 Rca Corporation Recording/playback apparatus using a single pilot tone for active tracking and control of a video disc pickup device
US4318141A (en) * 1979-12-07 1982-03-02 International Business Machines Corp. Buried servo recording systems and methods
US4286296A (en) * 1979-12-31 1981-08-25 International Business Machines Corporation Transducer positioning system
US4432026A (en) * 1981-08-10 1984-02-14 Ampex Corporation Apparatus and method for determining read head position

Also Published As

Publication number Publication date
JPH0136187B2 (de) 1989-07-28
US4488188A (en) 1984-12-11
EP0108224B1 (de) 1987-11-25
EP0108224A1 (de) 1984-05-16
JPS5984383A (ja) 1984-05-16

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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