DE69605400D1 - Fm-detektion einer gleitkörper-/plattenschnittstelle - Google Patents

Fm-detektion einer gleitkörper-/plattenschnittstelle

Info

Publication number
DE69605400D1
DE69605400D1 DE69605400T DE69605400T DE69605400D1 DE 69605400 D1 DE69605400 D1 DE 69605400D1 DE 69605400 T DE69605400 T DE 69605400T DE 69605400 T DE69605400 T DE 69605400T DE 69605400 D1 DE69605400 D1 DE 69605400D1
Authority
DE
Germany
Prior art keywords
interface
detection
sliding
plate
plate interface
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
DE69605400T
Other languages
English (en)
Other versions
DE69605400T2 (de
Inventor
Li-Yan Zhu
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of DE69605400D1 publication Critical patent/DE69605400D1/de
Application granted granted Critical
Publication of DE69605400T2 publication Critical patent/DE69605400T2/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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • 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
    • 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
    • G11B5/48—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
DE69605400T 1995-01-19 1996-01-11 Fm-detektion einer gleitkörper-/plattenschnittstelle Expired - Fee Related DE69605400T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/374,052 US5594595A (en) 1995-01-19 1995-01-19 FM detection of slider-disk interface
PCT/US1996/000347 WO1996022600A2 (en) 1995-01-19 1996-01-11 Fm detection of slider-disk interface

Publications (2)

Publication Number Publication Date
DE69605400D1 true DE69605400D1 (de) 2000-01-05
DE69605400T2 DE69605400T2 (de) 2000-03-23

Family

ID=23475065

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69605400T Expired - Fee Related DE69605400T2 (de) 1995-01-19 1996-01-11 Fm-detektion einer gleitkörper-/plattenschnittstelle

Country Status (6)

Country Link
US (1) US5594595A (de)
EP (1) EP0804793B1 (de)
JP (1) JP3408817B2 (de)
KR (1) KR100257222B1 (de)
DE (1) DE69605400T2 (de)
WO (1) WO1996022600A2 (de)

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EP1674974A3 (de) * 1994-06-07 2007-03-21 Hitachi, Global Storage Technologies Japan, Ltd. Gerät zum Speichern von Information
JPH0935407A (ja) * 1995-07-20 1997-02-07 Hitachi Ltd 磁気ディスク装置
US6239935B1 (en) * 1996-02-05 2001-05-29 Seagate Technolgy Llc Method and apparatus for starting a hard disk drive having separate landing and data zones
JPH1011927A (ja) * 1996-06-24 1998-01-16 Toshiba Corp 磁気ディスク装置用サーボライト装置及びサーボライト方法
US5880587A (en) * 1997-02-03 1999-03-09 International Business Machines Corporation Method and apparatus for performing in file slider take-off measurements through tuned external AE detection
US6008640A (en) * 1997-04-28 1999-12-28 Seagate Technology, Inc. Detection and measurement of head disc interference using read back signal (without acoustic emission sensor or laser doppler vibrometer)
US6275345B1 (en) * 1998-12-02 2001-08-14 International Business Machines Corporation System and method for estimating a frequency of slider airbearing resonance
US6757481B1 (en) * 1999-09-22 2004-06-29 Western Digital Technologies, Inc. Disk drives and disk drive-containing devices having selectively controllable and/or adaptive quiet and high performance modes of operation
US6510015B2 (en) 1999-12-10 2003-01-21 Seagate Technology Llc Magnetic disc having physical servo patterns with a magnetic carrier, and method of making and using the same
US6687008B1 (en) 2000-10-19 2004-02-03 Kla-Tencor Corporation Waveguide based parallel multi-phaseshift interferometry for high speed metrology, optical inspection, and non-contact sensing
US7158328B2 (en) * 2001-03-21 2007-01-02 Seagate Technology Llc Multi-phase acceleration of a data storage disc
US6671111B2 (en) 2001-06-01 2003-12-30 International Business Machines Corporation Readback signal detection and analysis in a magnetic data storage system
US6665134B2 (en) 2001-06-01 2003-12-16 International Business Machines Corporation Methods and apparatus for detection and analysis of an envelope of a frequency modulated readback signal in a magnetic storage system
US6980383B2 (en) * 2001-06-18 2005-12-27 Maxtor Corporation Monitoring of phenomena indicative of PTP in a magnetic disk drive
US6829115B2 (en) * 2002-02-05 2004-12-07 Seagate Technology Llc Method and apparatus for measuring half frequency whirl in a spindle motor
US7113354B2 (en) * 2002-03-28 2006-09-26 Seagate Technology Llc Media noise low-fly height test for a disc drive
US6989671B2 (en) * 2003-01-14 2006-01-24 Sae Magnetics (H.K.) Ltd. Detection of slider-disk interference using a dynamic parametric test
JP4223897B2 (ja) * 2003-08-28 2009-02-12 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 サーマルプロトリューション量を浮上量管理に用いる機能を持つ磁気ディスク装置、その機能を有す検査装置。
US7158325B1 (en) * 2003-11-06 2007-01-02 Maxtor Corporation Disk drive head touchdown detection with improved discrimination
CA2470516A1 (en) * 2004-05-17 2005-11-17 John D. Sutherland Battery charge testing apparatus
US20050286150A1 (en) * 2004-06-28 2005-12-29 Hitachi Global Storage Technologies Netherlands B.V. System and method for generating disk failure warning using read back signal
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
JP2007234113A (ja) * 2006-02-28 2007-09-13 Fujitsu Ltd ディスク装置およびディスク装置の制御方法
US7349170B1 (en) 2006-04-28 2008-03-25 Western Digital (Fremont), Llc Method of monitoring operation of a disk drive by analyzing the envelope of a read-back signal in the frequency domain
US8405927B2 (en) * 2006-10-02 2013-03-26 HGST Netherlands B.V. Apparatus and method for detecting low flying sliders
US7436620B1 (en) 2007-05-29 2008-10-14 Western Digital (Fremont), Llc Method for selecting an electrical power to be applied to a head-based flying height actuator
US7440220B1 (en) 2007-05-29 2008-10-21 Western Digital (Fremont), Llc Method for defining a touch-down power for head having a flying height actuator
US7551390B1 (en) 2007-08-21 2009-06-23 Western Digital Technologies, Inc. Disk drive to characterize misaligned servo wedges
US7583466B2 (en) * 2007-11-15 2009-09-01 Western Digital (Fremont), Llc Disk drive determining operating fly height by detecting head disk contact from disk rotation time
US7605996B2 (en) * 2007-12-28 2009-10-20 Hitachi Global Storage Technologies Netherlands B.V. Method and system for detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk
US7839595B1 (en) 2008-01-25 2010-11-23 Western Digital Technologies, Inc. Feed forward compensation for fly height control in a disk drive
US7630162B2 (en) * 2008-02-04 2009-12-08 Western Digital Technologies, Inc. Disk drive servoing off of first head while determining fly height for second head
US8482873B1 (en) 2008-02-18 2013-07-09 Western Digital Technologies, Inc. Disk drive employing pulse width modulation of head control signal
JP2010027156A (ja) * 2008-07-22 2010-02-04 Toshiba Storage Device Corp 磁気記録装置及び接触検出方法
US7675707B1 (en) 2008-11-21 2010-03-09 Western Digital Technologies, Inc. Disk drive employing repeatable disturbance compensation for fly height control
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
US7889447B2 (en) * 2009-01-14 2011-02-15 Seagate Technology Llc Readback signal-based head-disc contact detection using AM/FM demodulation
US8320069B1 (en) 2010-03-18 2012-11-27 Western Digital Technologies, Inc. Disk drive detecting positive correlation in fly height measurements
US8059357B1 (en) 2010-03-18 2011-11-15 Western Digital Technologies, Inc. Disk drive adjusting fly height when calibrating head/disk contact
US8593753B1 (en) 2010-04-22 2013-11-26 Western Digital Technologies, Inc. Touchdown detection
US7916420B1 (en) 2010-05-14 2011-03-29 Western Digital Technologies, Inc. Disk drive employing comb filter for repeatable fly height compensation
US8300338B1 (en) 2010-09-30 2012-10-30 Western Digital Technologies, Inc. Disk drive correlating different fly height measurements to verify disk warpage
US8699173B1 (en) * 2011-09-01 2014-04-15 Western Digital Technologies, Inc. Disk drive detecting touchdown event by evaluating frequency response of a touchdown metric
US9171581B2 (en) * 2013-03-08 2015-10-27 Seagate Technology Llc Friction force measurement assembly and method
US9001451B1 (en) 2013-08-12 2015-04-07 Seagate Technology Llc Clearance distance verification and control

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6282562A (ja) * 1985-10-07 1987-04-16 Nippon Gakki Seizo Kk ビデオデイスク再生装置の２倍速検出回路
JPS62132283A (ja) * 1985-12-04 1987-06-15 Fujitsu Ltd 磁気ヘツドの試験方法
US4777544A (en) * 1986-08-15 1988-10-11 International Business Machine Corporation Method and apparatus for in-situ measurement of head/recording medium clearance
US4841389A (en) * 1987-06-11 1989-06-20 International Business Machines Corporation Magnetic transducer crash anticipation and response method and apparatus
JP2926900B2 (ja) * 1990-06-01 1999-07-28 ソニー株式会社 ディスク再生装置
US5168413A (en) * 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for 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
JP2689845B2 (ja) * 1993-03-09 1997-12-10 住友金属工業株式会社 熱延鋼材の脱スケーリング方法
US5412519A (en) * 1993-08-26 1995-05-02 International Business Machines Corporation Optimization of disk drive spindle speed during low power mode

Also Published As

Publication number Publication date
WO1996022600A2 (en) 1996-07-25
EP0804793A2 (de) 1997-11-05
KR19980701569A (ko) 1998-05-15
EP0804793B1 (de) 1999-12-01
US5594595A (en) 1997-01-14
DE69605400T2 (de) 2000-03-23
WO1996022600A3 (en) 1996-09-19
JP3408817B2 (ja) 2003-05-19
JPH10512702A (ja) 1998-12-02
KR100257222B1 (ko) 2000-05-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: SEAGATE TECHNOLOGY LLC, SCOTTS VALLEY, CALIF., US

8328 Change in the person/name/address of the agent

Free format text: HENKEL, FEILER & HAENZEL, 81675 MUENCHEN

8339 Ceased/non-payment of the annual fee