DE69818345D1 - Rauschmessung in Datenspeichergeräten - Google Patents

Rauschmessung in Datenspeichergeräten

Info

Publication number
DE69818345D1
DE69818345D1 DE69818345T DE69818345T DE69818345D1 DE 69818345 D1 DE69818345 D1 DE 69818345D1 DE 69818345 T DE69818345 T DE 69818345T DE 69818345 T DE69818345 T DE 69818345T DE 69818345 D1 DE69818345 D1 DE 69818345D1
Authority
DE
Germany
Prior art keywords
data storage
storage devices
noise measurement
noise
measurement
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
DE69818345T
Other languages
English (en)
Other versions
DE69818345T2 (de
Inventor
Daniel Y Abramovitch
Terril N Hurst
Richard H Henze
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Application granted granted Critical
Publication of DE69818345D1 publication Critical patent/DE69818345D1/de
Publication of DE69818345T2 publication Critical patent/DE69818345T2/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
    • G11B5/59688—Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns
    • 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
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • 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
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • 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
    • 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
    • G11B5/59605—Circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2836—Fault-finding or characterising
    • G01R31/2837—Characterising or performance testing, e.g. of frequency response

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Feedback Control In General (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DE69818345T 1997-05-30 1998-05-28 Rauschmessung in Datenspeichergeräten Expired - Fee Related DE69818345T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US866367 1997-05-30
US08/866,367 US5909661A (en) 1997-05-30 1997-05-30 Method and apparatus for decomposing drive error signal noise sources

Publications (2)

Publication Number Publication Date
DE69818345D1 true DE69818345D1 (de) 2003-10-30
DE69818345T2 DE69818345T2 (de) 2004-07-01

Family

ID=25347459

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69818345T Expired - Fee Related DE69818345T2 (de) 1997-05-30 1998-05-28 Rauschmessung in Datenspeichergeräten

Country Status (4)

Country Link
US (1) US5909661A (de)
EP (1) EP0881626B1 (de)
JP (1) JPH1172520A (de)
DE (1) DE69818345T2 (de)

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USRE40413E1 (en) * 1998-11-06 2008-07-01 Purchased Patent Management Llc Method and apparatus for developing a dynamic servo signal from data
US6381088B1 (en) 1998-11-06 2002-04-30 Acorn Technologies, Inc. Apparatus for developing a dynamic servo signal from data in a magnetic disc drive and method
US6417982B1 (en) * 1998-12-02 2002-07-09 International Business Machines Corporation System and method for identifying and filtering a head suspension assembly resonance frequency
US6456450B1 (en) * 1998-12-04 2002-09-24 International Business Machines Corporation Method and apparatus for reducing track misregistration due to digital-to-analog converter quantization noise
JP3552158B2 (ja) * 1999-04-08 2004-08-11 富士通株式会社 記憶装置
US6522495B1 (en) * 1999-04-16 2003-02-18 International Business Machines Corporation System, method and program for determining the magnetic center shift within a disk drive system
US6628472B1 (en) * 1999-10-12 2003-09-30 Seagate Technoogy Llc Method and apparatus for feedforward cancellation using a phase lock loop
US6618219B1 (en) 1999-10-12 2003-09-09 Seagate Technology Llc Method and apparatus for feedforward cancellation using a peak detector
US6545836B1 (en) 1999-11-12 2003-04-08 Acorn Technologies, Inc. Servo control apparatus and method using absolute value input signals
US6594103B1 (en) 1999-11-12 2003-07-15 Acorn Technologies, Inc. Read channel generating absolute value servo signal
US6801387B1 (en) * 2000-04-14 2004-10-05 Seagate Technology Llc Control flow instability to reduce disk flutter and half frequency whirl
US20020030920A1 (en) * 2000-06-14 2002-03-14 Seagate Technology Llc Feed-forward compensation of cage frequency using a reference head in a servo-writer
US6654198B2 (en) 2000-08-23 2003-11-25 Seagate Technology Llc Repeatable run-out error compensation method for a disc drive
JP2004507024A (ja) 2000-08-23 2004-03-04 シーゲート　テクノロジー　リミテッド　ライアビリティ　カンパニー Ｐｅｓ直線性に基づいてヘッドを高精度制御するためのトラック走査データを用いる方法と装置
US6639753B1 (en) * 2000-09-01 2003-10-28 Hewlett-Packard Development Company, L.P. Method of forming a head assembly, a head assembly, and a linear tape drive
JP4189119B2 (ja) * 2000-09-21 2008-12-03 株式会社東芝 ヘッド位置決め制御システム及び同システムを備えた磁気ディスク装置
JP2002117636A (ja) * 2000-10-03 2002-04-19 Matsushita Electric Ind Co Ltd 磁気ディスク装置の制御装置、方法、記録媒体及び磁気ディスク装置の検査方法、装置
US7522480B2 (en) 2001-01-25 2009-04-21 Dphi Acquisitions, Inc. Digital tracking servo system with multi-track seek with an acceleration clamp
US6952321B1 (en) 2001-09-11 2005-10-04 Seagate Technology Llc Method for sensing run-out in data fields
US7224548B1 (en) * 2002-01-04 2007-05-29 Maxtor Corporation Determining contact write current in disk drive using position error signal variance
US7027251B1 (en) 2002-01-04 2006-04-11 Maxtor Corporation Method and apparatus to control pole tip protrusion
US6895352B2 (en) * 2002-03-12 2005-05-17 Itt Manufacturing Enterprises, Inc. Simultaneous rapid open and closed loop bode plot measurement using a binary pseudo-random sequence
US7023645B1 (en) 2002-05-03 2006-04-04 Maxtor Corporation Read error recovery method and apparatus
US20030220751A1 (en) * 2002-05-22 2003-11-27 Toh Michael Joo Chiang Method and apparatus to verify disc drive vibrational performance
US7035037B2 (en) * 2002-06-18 2006-04-25 Seagate Technology Llc Disc drive with compensation for non-repeatable runout
US6782324B2 (en) * 2002-08-16 2004-08-24 Sun Microsystems, Inc. Method and apparatus for using acoustic signals to identify one or more disc drives that are likely to fail
US7103426B2 (en) * 2003-01-28 2006-09-05 Rosemount Analytical Inc. Anticipatory high frequency noise compensation in a distributed process control system
US7215623B2 (en) * 2003-02-26 2007-05-08 Matsushita Electric Industrial Co., Ltd. Reproduction signal processing apparatus
US7050173B2 (en) * 2003-04-01 2006-05-23 Seagate Technology Llc Method and arrangement for removing noise and measurements of head-media spacing modulation for digital recording
US7119986B2 (en) * 2004-04-01 2006-10-10 Seagate Technology Llc Separator plate with head load/unload
CN101107652A (zh) * 2005-01-21 2008-01-16 皇家飞利浦电子股份有限公司 具有非线性观察器的盘驱动设备
US7328138B1 (en) * 2005-07-21 2008-02-05 Storage Technology Corporation Method and system of measurement and optimization of noise in servo systems
US7865254B2 (en) * 2007-01-11 2011-01-04 The Mathworks, Inc. Modeling of control systems with open-loop representations and factorization of components
US8086974B2 (en) * 2008-03-31 2011-12-27 International Business Machines Corporation Structure for fractional-N phased-lock-loop (PLL) system
US7472362B1 (en) 2008-03-31 2008-12-30 International Business Machines Corporation Method of minimizing phase noise
US7750697B2 (en) 2008-03-31 2010-07-06 International Business Machines Corporation Fractional-N phased-lock-loop (PLL) system
US7926015B2 (en) * 2008-03-31 2011-04-12 International Business Machines Corporation Optimization method for fractional-N phased-lock-loop (PLL) system
US9009455B2 (en) 2011-05-03 2015-04-14 Western Digital Technologies, Inc. Booting from a secondary storage device in order to accumulate disk drive performance data
CN104614660B (zh) * 2015-01-09 2017-04-26 中国电子科技集团公司第五十八研究所 基于有源光学水印的硬件木马检测方法
US9460742B1 (en) 2015-05-13 2016-10-04 Seagate Technology Llc Selecting servo controller based on predicted position error signal spectrum
US10672431B2 (en) 2018-10-10 2020-06-02 International Business Machines Corporation Damping layers for mitigation of motor-induced disturbances applied to a tape reel
CN114268087B (zh) * 2021-12-14 2023-12-01 北京航天测控技术有限公司 一种供电模块及供电方法

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SU1277202A1 (ru) * 1985-04-09 1986-12-15 Войсковая часть 13991 Устройство дл воспроизведени с носител магнитной записи
US5093751A (en) * 1990-03-21 1992-03-03 Hitachi Electronics Engineering Co., Ltd. Carry noise measuring system for magnetic recording medium
US5663847A (en) * 1995-03-27 1997-09-02 Abramovitch; Daniel Y. Rejection of disturbances on a disk drive by use of an accelerometer

Also Published As

Publication number Publication date
EP0881626A1 (de) 1998-12-02
EP0881626B1 (de) 2003-09-24
DE69818345T2 (de) 2004-07-01
US5909661A (en) 1999-06-01
JPH1172520A (ja) 1999-03-16

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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