BR8702794A - Circuito de canais otimizado para acionamento de disco e metodo de melhoramento de leitura-gravacao - Google Patents

Circuito de canais otimizado para acionamento de disco e metodo de melhoramento de leitura-gravacao

Info

Publication number
BR8702794A
BR8702794A BR8702794A BR8702794A BR8702794A BR 8702794 A BR8702794 A BR 8702794A BR 8702794 A BR8702794 A BR 8702794A BR 8702794 A BR8702794 A BR 8702794A BR 8702794 A BR8702794 A BR 8702794A
Authority
BR
Brazil
Prior art keywords
read
improvement method
channel circuit
disk driving
optimized channel
Prior art date
Application number
BR8702794A
Other languages
English (en)
Inventor
Thomas C Christensen
Jonathan D Coker
Earl A Cunningham
Richard C Jaworski
Gregory J Kerwin
Dean C Palmer
Jeffrey R Roepke
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of BR8702794A publication Critical patent/BR8702794A/pt

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10481—Improvement or modification of read or write signals optimisation methods
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing
    • 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
    • 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
    • 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
    • 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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing
    • G11B2020/183—Testing wherein at least one additional attempt is made to read or write the data when a first attempt is unsuccessful
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising
BR8702794A 1986-06-11 1987-06-01 Circuito de canais otimizado para acionamento de disco e metodo de melhoramento de leitura-gravacao BR8702794A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/872,793 US4821125A (en) 1986-06-11 1986-06-11 Compensation of write current adn delta-V for recording component and radial position

Publications (1)

Publication Number Publication Date
BR8702794A true BR8702794A (pt) 1988-03-01

Family

ID=25360304

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8702794A BR8702794A (pt) 1986-06-11 1987-06-01 Circuito de canais otimizado para acionamento de disco e metodo de melhoramento de leitura-gravacao

Country Status (6)

Country Link
US (1) US4821125A (pt)
EP (1) EP0249064B1 (pt)
JP (1) JPS6323206A (pt)
BR (1) BR8702794A (pt)
CA (1) CA1274623A (pt)
DE (1) DE3750315T2 (pt)

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US5416646A (en) * 1992-11-12 1995-05-16 Kabushiki Kaisha Toshiba Data recording and reproducing apparatus having read/write circuit with programmable parameter means
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JPH06349011A (ja) * 1993-06-08 1994-12-22 Sony Corp 磁気記録装置の書き込み電流設定回路
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US5379162A (en) * 1993-08-19 1995-01-03 International Business Machines Corporation Customized data recovery procedures selected responsive to readback errors and transducer head and disk parameters
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JP3135447B2 (ja) * 1994-01-27 2001-02-13 富士通株式会社 磁気ディスクドライブの制御方法及びその装置
US5426541A (en) * 1994-03-31 1995-06-20 International Business Machines Corporation Self-equalization method for partial-response maximum-likelihood disk drive systems
US5661614A (en) * 1994-05-31 1997-08-26 International Business Machines Corporation Method and apparatus for error recovery for unstable magnetorestrictive heads
JPH087498A (ja) * 1994-06-17 1996-01-12 Hitachi Ltd 記録情報再生装置
US5600500A (en) * 1994-11-14 1997-02-04 Seagate Technology, Inc. Performance based write current optimization process
US6038679A (en) * 1994-11-30 2000-03-14 International Business Machines Corporation Adaptive data recovery method and apparatus
US5557482A (en) * 1994-12-19 1996-09-17 International Business Machines Corporation Multipath channel apparatus and method for data storage devices and communications systems wherein a data path is selected based on errors
JP2658968B2 (ja) * 1995-04-27 1997-09-30 日本電気株式会社 磁気ディスク装置
US6002540A (en) * 1995-05-18 1999-12-14 International Business Machines Corporation Method and apparatus for rotary actuator arc compensation correction in a direct access storage device
US6014754A (en) * 1995-06-29 2000-01-11 International Business Machines Corporation Signal recording and regenerating apparatus and error recovery processing execution sequence change method
US5774285A (en) * 1995-09-06 1998-06-30 Seagate Technology, Inc. Selection of optimal read/write channel parameters in a hard disc drive
US5691857A (en) * 1995-09-29 1997-11-25 Quantum Corporation Method using matched filters for determining head positioner micro-jog in hard disk drive employing magneto-resistive heads
US5687036A (en) * 1995-09-29 1997-11-11 Seagate Technology, Inc. Selection of optimum write current in a disc drive to minimize the occurrence of repeatable read errors
US5696988A (en) * 1995-10-04 1997-12-09 Ge Fanuc Automation North America, Inc. Current/voltage configurable I/O module having two D/A converters serially coupled together such that data stream flows through the first D/A to the second D/A
KR0182952B1 (ko) 1995-12-21 1999-04-15 김광호 자기 디스크 기록장치의 기록전류 제어회로와 그 최적화방법
US6061197A (en) * 1996-11-25 2000-05-09 Seagate Technology, Inc. Adaptive control of a write inhibit signal in a disk drive based on adaptive track pitch
US5994951A (en) * 1997-01-21 1999-11-30 Vtc Inc. Automatic-tuning circuit for integrated continuous-time MOSFET-C filters
US6266203B1 (en) * 1997-06-13 2001-07-24 Seagate Technology Llc Integrated temperature sense circuit in a disc drive
JPH11144205A (ja) * 1997-09-04 1999-05-28 Toshiba Corp 磁気記録再生装置及び同装置に適用するデータ記録方法
US6252731B1 (en) 1997-10-16 2001-06-26 Seagate Technology Llc Parametric optimization using disc drive read channel quality measurements
KR100515720B1 (ko) 1998-02-21 2005-11-29 삼성전자주식회사 리드/라이트 채널인자 최적화방법
US6178054B1 (en) 1998-06-05 2001-01-23 Seagate Technology Llc Selecting write fault thresholds by head and disc location in a disc drive
US6181493B1 (en) 1998-06-05 2001-01-30 Seagate Technology Llc Write fault thresholds adaptive by head and disc location in a disc drive
US6130794A (en) * 1998-06-30 2000-10-10 Lucent Technologies Inc. Statistical monitoring of data channels for enhanced data recovery performance
US6268974B1 (en) 1998-07-13 2001-07-31 Seagate Technology Llc Gain optimization in a disc drive
US6445525B1 (en) 1998-07-16 2002-09-03 Seagate Technology Llc Disc drive performance by reducing areal data storage density
US6445530B1 (en) 1998-09-25 2002-09-03 Seagate Technology Llc Class AB H-bridge using current sensing MOSFETs
WO2000049606A2 (en) 1999-02-22 2000-08-24 Seagate Technology, Inc. Optimal reader/writer offsets and write fault thresholds in a disc drive
US6262619B1 (en) 1999-04-27 2001-07-17 International Business Machines Corporation Method and system for power amplifier offset nulling
US6747838B2 (en) 2001-02-15 2004-06-08 Seagate Technology Llc Thermal performance of an integrated amplifier in a disc drive
US6731453B2 (en) 2001-02-15 2004-05-04 Seagate Technology Llc Optimizing thermal performance of an integrated circuit in a disc drive
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US6791780B2 (en) * 2001-10-15 2004-09-14 Samsung Electronics Co., Inc. Method and apparatus for providing write current optimization
KR100468778B1 (ko) * 2002-12-13 2005-01-29 삼성전자주식회사 하드디스크 드라이브의 기록 전류 최적화 방법 및 기록밀도 설정 방법
US7227708B2 (en) * 2004-11-10 2007-06-05 Hitachi Global Storage Technologies Netherlands B.V. System and method for determining long-range erasure of adjacent tracks in hard disk drive
JP2020047345A (ja) * 2018-09-19 2020-03-26 株式会社東芝 磁気ディスク装置および記録電流適正化方法

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Also Published As

Publication number Publication date
JPS6323206A (ja) 1988-01-30
DE3750315T2 (de) 1995-03-09
CA1274623A (en) 1990-09-25
EP0249064B1 (en) 1994-08-03
US4821125A (en) 1989-04-11
EP0249064A3 (en) 1992-04-15
DE3750315D1 (de) 1994-09-08
EP0249064A2 (en) 1987-12-16

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Legal Events

Date Code Title Description
B21A Expiry acc. art. 78, item i of ipl- expiry of the term of protection

Free format text: PATENTE EXTINTA EM 01/06/2002