DE60306052T2 - Verfahren und System für die Implementierung einer Tiefflughöhenwarnung - Google Patents

Verfahren und System für die Implementierung einer Tiefflughöhenwarnung Download PDF

Info

Publication number
DE60306052T2
DE60306052T2 DE60306052T DE60306052T DE60306052T2 DE 60306052 T2 DE60306052 T2 DE 60306052T2 DE 60306052 T DE60306052 T DE 60306052T DE 60306052 T DE60306052 T DE 60306052T DE 60306052 T2 DE60306052 T2 DE 60306052T2
Authority
DE
Germany
Prior art keywords
head
dasd
warning
amplitude
radii
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
DE60306052T
Other languages
German (de)
English (en)
Other versions
DE60306052D1 (de
Inventor
Gordon James S.W. Rochester Smith
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.)
HGST Netherlands BV
HGST Inc
Original Assignee
Hitachi Global Storage Technologies Netherlands BV
Hitachi Global Storage Technologies Inc
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 Hitachi Global Storage Technologies Netherlands BV, Hitachi Global Storage Technologies Inc filed Critical Hitachi Global Storage Technologies Netherlands BV
Application granted granted Critical
Publication of DE60306052D1 publication Critical patent/DE60306052D1/de
Publication of DE60306052T2 publication Critical patent/DE60306052T2/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
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/6029—Measurement using values derived from the data signal read from the disk
    • 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
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • 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
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
    • 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
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • 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
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 

Landscapes

  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Debugging And Monitoring (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
DE60306052T 2002-08-15 2003-08-07 Verfahren und System für die Implementierung einer Tiefflughöhenwarnung Expired - Fee Related DE60306052T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US219893 2002-08-15
US10/219,893 US6906878B2 (en) 2002-08-15 2002-08-15 Method and system for implementing in situ low flyheight warning

Publications (2)

Publication Number Publication Date
DE60306052D1 DE60306052D1 (de) 2006-07-27
DE60306052T2 true DE60306052T2 (de) 2007-01-11

Family

ID=31714820

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60306052T Expired - Fee Related DE60306052T2 (de) 2002-08-15 2003-08-07 Verfahren und System für die Implementierung einer Tiefflughöhenwarnung

Country Status (8)

Country Link
US (1) US6906878B2 (enExample)
EP (1) EP1396847B1 (enExample)
JP (1) JP4098681B2 (enExample)
KR (1) KR100591966B1 (enExample)
CN (1) CN1314003C (enExample)
DE (1) DE60306052T2 (enExample)
SG (1) SG121786A1 (enExample)
TW (1) TW200410215A (enExample)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6822816B2 (en) * 2002-05-23 2004-11-23 Seagate Technology Llc Electrical detection of low flying read/write head for a disc drive
US7430083B2 (en) * 2002-05-23 2008-09-30 Seagate Technology Llc Virtual head fly profile measurement
JP2004185735A (ja) * 2002-12-04 2004-07-02 Matsushita Electric Ind Co Ltd 磁気ヘッドアセンブリおよび磁気ディスク装置
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
US7370058B2 (en) * 2003-10-28 2008-05-06 International Business Machines Corporation Algorithm for sorting bit sequences in linear complexity
US7467138B2 (en) * 2003-10-28 2008-12-16 International Business Machines Corporation Algorithm for sorting bit sequences in linear complexity
US20060146437A1 (en) * 2004-12-30 2006-07-06 Andrei Khurshudov Apparatus for detecting contact between a read-write head and the accessed disk surface in a hard disk drive
US7190547B2 (en) * 2004-12-30 2007-03-13 Samsung Electronics Co., Ltd. Methods for detecting contact between a read-write head and the accessed disk surface in a hard disk drive
JP2007179717A (ja) * 2005-12-01 2007-07-12 Fujitsu Ltd 接触検出装置、接触検出方法、ヘッドの製造方法
US7280305B2 (en) * 2006-01-13 2007-10-09 Samsung Electronics Co., Ltd. Method and apparatus for estimating and controlling the flying height of a read-write head in a hard disk drive
US7573668B2 (en) * 2006-01-16 2009-08-11 Samsung Electronics Co., Ltd. Method and apparatus for sensing leakage current to estimate and possibly adjust flying height of a read-write head in a hard disk drive
US7558015B2 (en) * 2006-03-29 2009-07-07 Maxtor Corporation Actuation efficiency based contact detection
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
JP2008204561A (ja) * 2007-02-21 2008-09-04 Hitachi Global Storage Technologies Netherlands Bv 情報記録装置
US20080204922A1 (en) * 2007-02-28 2008-08-28 Motomu Hashizume Methods and apparatus to monitor hard-disk drive head position
US7616398B2 (en) * 2007-11-09 2009-11-10 Hitachi Global Storage Technologies Netherlands B.V. Fly height adjustment device calibration
US7788268B2 (en) * 2008-01-08 2010-08-31 International Business Machines Corporation In-place sorting using node specific mask width
JP4986876B2 (ja) * 2008-02-02 2012-07-25 ヒタチグローバルストレージテクノロジーズネザーランドビーブイ ディスク・ドライブ装置
US8934192B1 (en) * 2008-11-24 2015-01-13 Western Digital Technologies, Inc. Disk drive determining operating fly height by detecting head disk contact from read signal amplitude variance
JP2011018396A (ja) * 2009-07-08 2011-01-27 Hitachi Global Storage Technologies Netherlands Bv ディスク・ドライブ及びクリアランス測定方法
US8169726B2 (en) * 2010-07-19 2012-05-01 Lsi Corporation Disk file preamplifier frequency-response and time delay compensation

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168413A (en) * 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for disk drive system
US5220466A (en) * 1991-05-21 1993-06-15 International Business Machines Corporation Method and apparatus for digital filter control in a partial-response maximum-likelihood disk drive system
JP2711207B2 (ja) * 1992-05-19 1998-02-10 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 クリアランス及び滑りの測定が可能でヘッド衝突の警告をするディスク・ファイル記憶装置及びクリアランス測定方法
US5377058A (en) * 1992-12-31 1994-12-27 International Business Machines Corporation Fly height servo control of read/write head suspension
JPH0757376A (ja) * 1993-08-18 1995-03-03 Hitachi Ltd 磁気ディスク装置及びディスクサブシステム
US5497085A (en) * 1994-12-19 1996-03-05 Conner Peripherals, Inc. Method for determining an outer diameter rolloff in a process for making magnetic disks
JP3199996B2 (ja) * 1995-11-15 2001-08-20 株式会社東芝 ディスク記録再生システム及びそのヘッド浮上変動検出方法
US5999360A (en) 1996-10-15 1999-12-07 Seagate Technology, Inc. Disc drive servo system employing thermal signals
US6046596A (en) 1996-11-13 2000-04-04 Seagate Technology, Inc. Capacitance probe for magnetic recording head transducer to disc surface spacing measurement
US5909330A (en) * 1996-12-12 1999-06-01 Maxtor Corporation Method and apparatus for detecting head flying height in a disk drive
US6735027B2 (en) 1998-06-02 2004-05-11 Texas Instruments Incorporated Head fly height by using the applied peak area ratio to determine signal PW50
US6301797B1 (en) * 1998-06-04 2001-10-16 Seagate Technology Llc Recognizing and compensating for disk shift in computer disk drives
US6411458B1 (en) * 1999-04-23 2002-06-25 Western Digital Technologies, Inc. Disk drive employing method of monitoring transducer flying height to retire defective data site on recording surface
US6570730B1 (en) 1999-06-09 2003-05-27 Seagate Technology, Llc. Shear-based transducer for HDD read/write element height control

Also Published As

Publication number Publication date
CN1503232A (zh) 2004-06-09
US20040032681A1 (en) 2004-02-19
CN1314003C (zh) 2007-05-02
KR20040016424A (ko) 2004-02-21
US6906878B2 (en) 2005-06-14
TW200410215A (en) 2004-06-16
JP2004111022A (ja) 2004-04-08
EP1396847A3 (en) 2004-07-21
DE60306052D1 (de) 2006-07-27
EP1396847B1 (en) 2006-06-14
JP4098681B2 (ja) 2008-06-11
EP1396847A2 (en) 2004-03-10
SG121786A1 (en) 2006-05-26
KR100591966B1 (ko) 2006-06-21

Similar Documents

Publication Publication Date Title
DE60306052T2 (de) Verfahren und System für die Implementierung einer Tiefflughöhenwarnung
DE3787428T2 (de) Verfahren zur Messung des Abstandes eines Gleitkopfes von einer Magnetplatte einer Platteneinheit.
US4872071A (en) Method and apparatus for detecting abnormal operation of moving storage apparatus
DE69605400T2 (de) Fm-detektion einer gleitkörper-/plattenschnittstelle
DE69122326T2 (de) Magnetisches Speichersystem und Betriebsweise
JP2711207B2 (ja) クリアランス及び滑りの測定が可能でヘッド衝突の警告をするディスク・ファイル記憶装置及びクリアランス測定方法
DE68920821T2 (de) Magnetische Medien enthaltende Referenzeinrichtung und Verfahren zur Ermittlung einer Magnetkopflage hinsichtlich der Referenzeinrichtung.
DE69606784T2 (de) Verfahren und vorrichtung zum positionieren eines magnetoresistiven kopfes
DE19636118C2 (de) Verfahren zur Kompensation eines Zwischenkopfpositionsversatzes und Servoabtastzeitgebungserzeugungsschaltung
DE68921739T2 (de) Methode und Gerät zum Prüfen der Wirkungsweise einer Speichervorrichtung.
DE69511893T2 (de) Verfahren zur bestimmung des äusseren krümmungsradius in einem fertigungsprozess für magnetplatten
DE10241174A1 (de) Magnetisches Aufzeichnungssystem, -Verfahren und -Medium
DE102013009362A1 (de) Dynamische Spurteilungssteuerung für die geschindelte magnetische Aufzeichnung (SMR)
DE69802451T2 (de) Rasterkraftmikroskopie Datenspeichersysteme
US4146911A (en) Head spacing control
DE69602007T2 (de) Zerstörungsfreie in-situ landungsgeschwindigkeitsfeststellung von magnetischen festplattespeichern
DE19723227A1 (de) Verfahren zum Optimieren eines Schreibstroms während eines Servo-Beschreibens einer Magnetplatten-Aufzeichnungsvorrichtung
US8526133B2 (en) Systems and methods for user data based fly height calculation
DE102013012757A1 (de) Spurnachführung unter Verwendung von Datenmerkmalen als Positionsinformationen
DE69931715T2 (de) System und Verfahren zur Messung von relativen und absoluten Amplituden eines Lesesignals von einem Datenspeichermedium
DE19721069C2 (de) Verfahren zum Kompensieren einer nicht-linearen Drehmomentcharakteristik eines Servosystems für ein Festplattenlaufwerk
DE60112215T2 (de) In-Situ Drucksensor begründet auf Lesekopfwiederstand
DE102013019082A1 (de) Dynamische Flughöhenregelung, die unempfindlich für Bewegung außerhalb der Spur ist
DE69513071T2 (de) Magnetisches Datenspeichersystem
DE19914223A1 (de) Vorrichtung und zugehöriges Verfahren zum Schützen eines magnetoresistiven Sensors gegen Beschädigung während eines thermischen Unebenheitsereignisses

Legal Events

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