DE69606784D1 - Verfahren und vorrichtung zum positionieren eines magnetoresistiven kopfes - Google Patents

Verfahren und vorrichtung zum positionieren eines magnetoresistiven kopfes

Info

Publication number
DE69606784D1
DE69606784D1 DE69606784T DE69606784T DE69606784D1 DE 69606784 D1 DE69606784 D1 DE 69606784D1 DE 69606784 T DE69606784 T DE 69606784T DE 69606784 T DE69606784 T DE 69606784T DE 69606784 D1 DE69606784 D1 DE 69606784D1
Authority
DE
Germany
Prior art keywords
positioning
magnetoresistive head
magnetoresistive
head
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
DE69606784T
Other languages
English (en)
Other versions
DE69606784T2 (de
Inventor
Gordon J Smith
Hal Hjalmar Ottesen
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.)
IBM United Kingdom Ltd
HGST Netherlands BV
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 DE69606784D1 publication Critical patent/DE69606784D1/de
Publication of DE69606784T2 publication Critical patent/DE69606784T2/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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/72—Investigating presence of flaws
    • 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
    • G11B21/022—Programmed access in sequence to indexed parts of operating record carriers
    • G11B21/025—Programmed access in sequence to indexed parts of operating record carriers of rotating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • 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
    • G11B5/455—Arrangements for functional testing of heads; Measuring arrangements for heads
    • 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
    • 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
    • G11B5/54—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
    • G11B5/5547—"Seek" control and circuits therefor
    • 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
    • G11B5/5565—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for compensation of variations of physical parameters, e.g. temperature
    • 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
    • G11B5/596—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
    • G11B5/59683—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 for magnetoresistive heads
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
    • G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • 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
    • G11B5/59627—Aligning for runout, eccentricity or offset compensation
    • 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
    • G11B5/59644—Acquisition or selection of servo format from a system reference

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Magnetic Record Carriers (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
DE69606784T 1996-01-02 1996-12-13 Verfahren und vorrichtung zum positionieren eines magnetoresistiven kopfes Expired - Fee Related DE69606784T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/581,981 US5739972A (en) 1996-01-02 1996-01-02 Method and apparatus for positioning a magnetoresistive head using thermal response to servo information on the record medium
PCT/US1996/019945 WO1997024608A1 (en) 1996-01-02 1996-12-13 Method and apparatus for positioning a magnetoresistive head

Publications (2)

Publication Number Publication Date
DE69606784D1 true DE69606784D1 (de) 2000-03-30
DE69606784T2 DE69606784T2 (de) 2000-08-31

Family

ID=24327358

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69606784T Expired - Fee Related DE69606784T2 (de) 1996-01-02 1996-12-13 Verfahren und vorrichtung zum positionieren eines magnetoresistiven kopfes

Country Status (8)

Country Link
US (4) US5739972A (de)
EP (1) EP0871867B1 (de)
JP (1) JP3232102B2 (de)
KR (1) KR100241645B1 (de)
DE (1) DE69606784T2 (de)
MY (1) MY116696A (de)
PL (1) PL182005B1 (de)
WO (1) WO1997024608A1 (de)

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6088176A (en) * 1993-04-30 2000-07-11 International Business Machines Corporation Method and apparatus for separating magnetic and thermal components from an MR read signal
US5872676A (en) * 1996-01-02 1999-02-16 International Business Machines Corporation Method and apparatus for positioning a dual element magnetoresistive head using thermal signals
US5999360A (en) * 1996-10-15 1999-12-07 Seagate Technology, Inc. Disc drive servo system employing thermal signals
US5999348A (en) * 1997-03-14 1999-12-07 Seagate Technology, Inc. Data storage system having baseline shift correction
US6239936B1 (en) 1997-08-19 2001-05-29 International Business Machines Corporation Method and apparatus for calibrating a thermal response of a magnetoresistive element
US6122131A (en) * 1997-09-12 2000-09-19 Quantum Corporation Adaptively-controlled disk drive assembly
US5923492A (en) * 1997-09-30 1999-07-13 Maxtor Corporation Variable-phase servo burst pattern used to minimize shield-related side readings
US6400520B1 (en) 1997-10-23 2002-06-04 Seagate Technology Llc Disc drive having a preamplifier multiplexer
JP2002510836A (ja) * 1998-04-06 2002-04-09 イメイション・コーポレイション データ記憶ディスク用リバース光マスタリング
US6456213B1 (en) * 1998-06-11 2002-09-24 Seagate Technology Llc Digitizing readback waveform for testing hard disc drives
US6195219B1 (en) 1998-10-20 2001-02-27 International Business Machines Corporation Method and apparatus for improving a thermal response of a magnetoresistive element
US6310739B1 (en) * 1999-03-31 2001-10-30 Maxtor Corporation Method and system for detection recording media defacts
US6310740B1 (en) 1999-06-29 2001-10-30 Western Digital Technologies, Inc Disk drive including N-current preamplifier for generating N-independently controlled write currents
US6392841B1 (en) * 1999-07-16 2002-05-21 International Business Machines Corporation Method and apparatus for restoring a thermal response of a magnetoresistive read transducer
US6417981B1 (en) * 1999-09-23 2002-07-09 International Business Machines Corporation System and method for measuring absolute transducer-medium clearance using a thermal response of an MR transducer
US6567231B1 (en) 1999-10-29 2003-05-20 International Business Machines Corporation Vibration mode compensation for disk drive
US6525892B1 (en) 2000-01-28 2003-02-25 Western Digital Technologies, Inc. Method of calibrating a write current-setting for servo writing a disk drive
DE60120287T2 (de) 2000-07-27 2007-06-06 Hitachi Global Storage Technologies Netherlands B.V. Kopfaufhängungsvorrichtung für Gerät zur Datenaufzeichnung auf Platten
EP1176590B1 (de) * 2000-07-27 2006-06-07 Hitachi Global Storage Technologies Netherlands B.V. Kopfaufhängungsvorrichtung für Gerät zur Datenaufzeichnung auf Platten
US6733994B2 (en) * 2000-10-04 2004-05-11 The Trustees Of The University Of Pennsylvania Highly expressible genes
US6628598B2 (en) * 2000-12-05 2003-09-30 Imation Corp. Patterned media system
US6751060B2 (en) 2000-12-05 2004-06-15 Imation Corp. Magnetic media with readable topographical features
US6724550B2 (en) 2001-01-23 2004-04-20 Seagate Technology Llc Adaptive dampening of thermal asperity events in disc drives
US6657809B2 (en) 2001-01-29 2003-12-02 International Business Machines Corporation Method and apparatus for positioning a transducer using a phase difference in surface profile variations on a storage medium
US6600635B2 (en) 2001-03-09 2003-07-29 Hitachi Global Storage Technologies Netherlands B.V. Combined magnetic data and burnish head for magnetic recording
US6762899B2 (en) 2001-03-16 2004-07-13 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for estimating the flyheight of an airbearing slider in a storage device using variable spindle velocity
US6785079B2 (en) 2001-03-16 2004-08-31 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for estimating the flyheight of an airbearing slider in a storage device
WO2002095738A1 (en) * 2001-05-22 2002-11-28 Seagate Technology Llc Method and system for measuring fly height
TW514893B (en) * 2001-06-18 2002-12-21 Acer Labs Inc Long seeking control system for disc drive and method thereof
US6654191B2 (en) * 2001-07-12 2003-11-25 International Business Machines Corporation Restoration of hard disk drive readback signal in the presence of thermal modulation
US6671232B1 (en) * 2001-07-25 2003-12-30 Maxtor Corporation Method and apparatus for measuring the surface temperature of a disk
US7046463B2 (en) * 2002-03-28 2006-05-16 Seagate Technology Llc Low flying head detection using readback signal amplitude modulation
US6883368B2 (en) 2002-04-18 2005-04-26 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for characterizing the microwaviness of a disk surface
US7027263B2 (en) * 2002-05-07 2006-04-11 Hitachi Global Storage Technologies Netherlands B.V. Apparatus for look-ahead thermal sensing in a data storage device
US6956707B2 (en) * 2002-05-07 2005-10-18 Hitachi Global Storage Technologies Netherlands B.V. Method for look-ahead thermal sensing in a data storage device
US6857937B2 (en) * 2002-05-30 2005-02-22 Komag, Inc. Lapping a head while powered up to eliminate expansion of the head due to heating
JP4660055B2 (ja) * 2002-07-03 2011-03-30 東芝ストレージデバイス株式会社 ヘッド位置制御方法、デイスク装置及びサーボトラックライト方法
KR100464438B1 (ko) * 2002-11-25 2004-12-31 삼성전자주식회사 트랙번호 매핑을 이용한 헤드 스위칭 방법
US7259927B2 (en) * 2003-07-14 2007-08-21 Agere Systems, Inc. Method and apparatus for improving signal-to-noise ratio for hard disk drives
DE10336820A1 (de) * 2003-08-11 2005-01-20 Physik Instrumente (Pi) Gmbh & Co. Kg Verfahren und Schaltungsanordnung zur präzisen, dynamischen digitalen Ansteuerung von insbesondere Piezoaktoren für Mikropositioniersysteme
US7016131B2 (en) * 2003-08-29 2006-03-21 Agency For Science, Technology And Research Method and implementation of in-situ absolute head medium spacing measurement
US6912098B2 (en) * 2003-09-08 2005-06-28 Samsung Electronics. Co., Ltd. Method for dynamically measuring suspension in-plane and out-plane thermal drift hard disk drives
US7151645B2 (en) * 2003-09-23 2006-12-19 Seagate Technology Llc Interleaved repeatable runout estimation
US20050213482A1 (en) * 2004-03-24 2005-09-29 Imation Corp. Multi-track mastering techniques
US20050225889A1 (en) * 2004-04-13 2005-10-13 Brittenham Steven L Magnetic media read signal filter
US20060073422A1 (en) * 2004-09-28 2006-04-06 Imation Corp. Portable conformable deep ultraviolet master mask
US20080274140A1 (en) * 2004-11-19 2008-11-06 David B Weiner Vaccines and Methods for Using the Same
US7427466B2 (en) * 2004-11-29 2008-09-23 Imation Corp. Anti-reflection optical data storage disk master
US7161753B2 (en) * 2005-01-28 2007-01-09 Komag, Inc. Modulation of sidewalls of servo sectors of a magnetic disk and the resultant disk
JP4675722B2 (ja) 2005-09-02 2011-04-27 株式会社東芝 磁気記録媒体
US7319570B2 (en) * 2005-09-19 2008-01-15 Seagate Technology Llc Random vibration and shock compensator using a disturbance observer
US7265922B2 (en) * 2005-10-27 2007-09-04 International Business Machines Corporation Asperity data storage system, method and medium
US7633697B2 (en) * 2006-06-12 2009-12-15 Broadcom Corporation Magnetic disk drive, servo writer, self-servo writer and methods for use therewith
US7538967B1 (en) * 2006-08-22 2009-05-26 Marvell International Ltd. Method and apparatus for estimating a position of a head in a disk drive
US20080055772A1 (en) * 2006-09-01 2008-03-06 Mcmillan Chris Method and apparatus for predicting contact of a read-write head in a hard disk drive
JP2008159205A (ja) * 2006-12-26 2008-07-10 Fujitsu Ltd 記憶装置、記憶装置用ヘッドの異常検出方法、異常検出プログラム
US7489472B2 (en) * 2007-01-24 2009-02-10 Maxtor Corporation High-order hybrid actuator controller
US7542227B2 (en) * 2007-06-29 2009-06-02 Samsung Electronics Co., Ltd. Flying height measurement and control with user data signal
US7486469B1 (en) * 2007-10-31 2009-02-03 Hitachi Global Storage Technologies Netherlands B.V. Minimizing a mechanical mode excitation utilizing a generated seek trajectory
US8077423B1 (en) * 2007-11-14 2011-12-13 Marvell International Ltd. Fly-height touchdown detection circuits and methods
US7986493B2 (en) * 2007-11-28 2011-07-26 Seagate Technology Llc Discrete track magnetic media with domain wall pinning sites
US7948704B2 (en) * 2007-12-17 2011-05-24 Seagate Technology Llc Using servo data harmonics to monitor head-medium spacing
US7957084B2 (en) * 2008-02-04 2011-06-07 Seagate Technology Llc Extraction of transducer position information from bit patterned magnetic media
KR20090113559A (ko) * 2008-04-28 2009-11-02 삼성전자주식회사 터치-다운 근접 비행 높이 추정 방법 및 장치와 이를이용한 비행 높이 조정 방법 및 디스크 드라이브
US20100073808A1 (en) * 2008-09-23 2010-03-25 Seagate Technology Llc Position sensing in discrete track recording
US8045282B2 (en) * 2009-02-03 2011-10-25 Seagate Technology Llc Measurement of track eccentricity on bit patterned media
KR20120093163A (ko) 2009-09-14 2012-08-22 더 트러스티스 오브 더 유니버시티 오브 펜실바니아 Ｉｌ-15 수용체 알파 및/또는 이를 인코딩하는 핵산 분자를 포함하는 백신 및 면역 치료제, 및 이를 이용하는 방법
US8477455B2 (en) * 2010-11-16 2013-07-02 HGST Netherlands B.V. Noise and particle shield for contact sensor in a slider
WO2013122550A1 (en) 2012-02-17 2013-08-22 Agency For Science, Technology And Research A recording medium and a method of writing servo information on the same
US8705198B1 (en) 2012-08-27 2014-04-22 Seagate Technology Llc Write position compensation
US9240199B2 (en) * 2014-03-12 2016-01-19 Avago Technologies General Ip (Singapore) Pte. Ltd. Systems and methods for distortion characterization
US8947821B1 (en) * 2014-07-17 2015-02-03 International Business Machines Corporation Detecting a servo pattern using a data channel in a magnetic tape drive

Family Cites Families (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416373A (en) * 1966-04-01 1968-12-17 Ralph J. Havens Displacement detector
NL7309590A (nl) * 1973-07-10 1975-01-14 Philips Nv Inrichting voor het sturen van de positie van een magneetkop ten opzichte van een te volgen informatiespoor.
DE3045401A1 (de) * 1980-12-02 1982-07-01 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum pruefen von einspritzduesen
US4498146A (en) * 1982-07-30 1985-02-05 At&T Bell Laboratories Management of defects in storage media
US4485337A (en) * 1983-05-09 1984-11-27 Control Data Corporation Servo data driven motor speed control
US4532802A (en) * 1984-05-31 1985-08-06 International Business Machines Corporation Apparatus for analyzing the interface between a recording disk and a read-write head
CA1248222A (en) * 1984-08-27 1989-01-03 Yutaka Souda Magnetic transducer head utilizing magnetoresistance effect
US4647992A (en) * 1984-11-26 1987-03-03 International Business Machines Corporation Combined magnetic channel signal sensor and servo control track following system and method
JPS61177622A (ja) * 1985-01-31 1986-08-09 Matsushita Electric Ind Co Ltd 磁気デイスク装置
US4669011A (en) * 1985-05-03 1987-05-26 Eastman Kodak Company Slider assembly with dynamically positionable transducer
US4712144A (en) * 1985-08-20 1987-12-08 International Business Machines Corporation Method and apparatus for reading recorded data by a magnetoresistive head
JPS6256849A (ja) * 1985-09-06 1987-03-12 Snow Brand Milk Prod Co Ltd 通電加熱法に用いられるセンサ−
EP0227845B1 (de) * 1985-11-19 1990-05-30 International Business Machines Corporation Verfahren und Vorrichtung zur Regelung der Flughöhe des Kopfes in einem Magnetspeicher
JPS62250570A (ja) * 1986-04-22 1987-10-31 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 記憶装置用変換器
US4747698A (en) * 1986-04-30 1988-05-31 International Business Machines Corp. Scanning thermal profiler
US4777544A (en) * 1986-08-15 1988-10-11 International Business Machine Corporation Method and apparatus for in-situ measurement of head/recording medium clearance
US4802033A (en) * 1986-11-07 1989-01-31 Eastman Kodak Company Predictive positioning offset compensation for high TPI disk systems
JPS63191316A (ja) * 1987-02-03 1988-08-08 Matsushita Electric Ind Co Ltd 磁気記録媒体
JPH0198180A (ja) * 1987-10-09 1989-04-17 Mitsubishi Electric Corp 記憶装置
US4931887A (en) * 1988-02-01 1990-06-05 International Business Machines Corporation Capacitive measurement and control of the fly height of a recording slider
US5084791A (en) * 1988-05-10 1992-01-28 Quantum Corporation Head position control system for fixed drive including position encoder, temperature sensor and embedded fine servo information
US4949036A (en) * 1988-07-07 1990-08-14 Seagate Technology, Inc. Disc drive error mapping using threshold comparison methods
JPH0231323A (ja) * 1988-07-20 1990-02-01 Asahi Glass Co Ltd 磁気記録用メモリーディスク
US4914398A (en) * 1988-08-01 1990-04-03 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels containing MR sensors
US5070495A (en) * 1989-04-12 1991-12-03 International Business Machines Corporation Write calibration for magnetooptic disk recorders
DE69024255T2 (de) * 1989-05-11 1996-05-15 Mitsubishi Electric Corp Defektprüfvorrichtung für scheibenförmigen Datenaufzeichnungsträger
US5054936A (en) * 1989-11-16 1991-10-08 Jacob Fraden Sensor for active thermal detection
US5032935A (en) * 1989-12-12 1991-07-16 International Business Machines Corporation Amplification of signals produced by a magnetoresistive element
US5057785A (en) * 1990-01-23 1991-10-15 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels
US5079663A (en) * 1990-01-29 1992-01-07 International Business Machines Corporation Magnetoresistive sensor with track following capability
US5418770A (en) * 1990-06-29 1995-05-23 Hitachi, Ltd. Method of and apparatus for correcting edge interval of pit in optical recording/read-out apparatus
US5130866A (en) * 1990-07-17 1992-07-14 International Business Machines Corporation Method and circuitry for in-situ measurement of transducer/recording medium clearance and transducer magnetic instability
JPH0495218A (ja) * 1990-08-10 1992-03-27 Matsushita Electric Ind Co Ltd 磁気ディスクおよびこれを用いた磁気ディスク装置
JPH04109421A (ja) * 1990-08-30 1992-04-10 Fujitsu Ltd 磁気ディスク装置
US5185681A (en) * 1990-09-28 1993-02-09 Seagate Thermal offset compensation for high density disk drives
JPH04141822A (ja) * 1990-10-02 1992-05-15 Fujitsu Ltd 磁気ディスクおよび磁気ディスク装置
US5168413A (en) * 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for disk drive system
US5251082A (en) * 1991-06-13 1993-10-05 Elliott Timothy J Miniaturized disk file pluggable into a card terminal
US5233482A (en) * 1991-07-31 1993-08-03 International Business Machines Corporation Thermal asperity compensation for PRML data detection
JPH05174515A (ja) * 1991-12-20 1993-07-13 Fujitsu Ltd 磁気ヘッドの位置決め方法およびその装置
JP3254743B2 (ja) * 1992-08-17 2002-02-12 ソニー株式会社 位置決め信号の書き込み方法
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US5321559A (en) * 1992-08-27 1994-06-14 Quantum Corporation Asynchronous peak detection of information embedded within PRML class IV sampling data detection channel
US5327298A (en) * 1992-09-10 1994-07-05 International Business Machines Corporation Noise minimization for magnetic data storage drives using oversampling techniques
JPH06111502A (ja) * 1992-09-30 1994-04-22 Sony Corp 磁気ディスク装置
US5301080A (en) * 1992-12-31 1994-04-05 International Business Machines Corporation Bias servo loop for magneto-resistive read/write head
US5377058A (en) * 1992-12-31 1994-12-27 International Business Machines Corporation Fly height servo control of read/write head suspension
US5424885A (en) * 1993-01-11 1995-06-13 Seagate Technology, Inc. Method for following data tracks in a disc drive using an improved thermal calibration method
US5455730A (en) * 1993-02-18 1995-10-03 International Business Machines Corporation Contact magnetic recording disk file with a magnetoresistive read sensor
JP3344495B2 (ja) * 1993-03-04 2002-11-11 ソニー株式会社 磁気ディスク装置
JPH06290563A (ja) * 1993-03-31 1994-10-18 Hoya Corp 磁気ヘッド及び磁気記録・再生装置
JP2879185B2 (ja) * 1993-04-16 1999-04-05 ティーディーケイ株式会社 光磁気ディスク
US5367409A (en) * 1993-04-29 1994-11-22 International Business Machines Corporation Even harmonic distortion compensation for digital data detection
US5527110A (en) * 1993-04-30 1996-06-18 International Business Machines Corporation Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging
US5388014A (en) * 1993-09-10 1995-02-07 Hewlett-Packard Company Apparatus and method of sensing the position of a magnetic head
US5457585A (en) * 1994-04-22 1995-10-10 International Business Machines Corporation Tape edge detector using off tape and on tape MR noise

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US6384994B1 (en) 2002-05-07
JP3232102B2 (ja) 2001-11-26
EP0871867B1 (de) 2000-02-23
WO1997024608A1 (en) 1997-07-10
DE69606784T2 (de) 2000-08-31
KR970060048A (ko) 1997-08-12
US6084754A (en) 2000-07-04
KR100241645B1 (ko) 2000-02-01
PL182005B1 (pl) 2001-10-31
US5739972A (en) 1998-04-14
PL327579A1 (en) 1998-12-21
US5880901A (en) 1999-03-09
EP0871867A1 (de) 1998-10-21
JPH10509831A (ja) 1998-09-22
MY116696A (en) 2004-03-31

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