SG70001A1 - Radial self-propagation pattern generation for disk file servowriting - Google Patents

Radial self-propagation pattern generation for disk file servowriting

Info

Publication number
SG70001A1
SG70001A1 SG1997000899A SG1997000899A SG70001A1 SG 70001 A1 SG70001 A1 SG 70001A1 SG 1997000899 A SG1997000899 A SG 1997000899A SG 1997000899 A SG1997000899 A SG 1997000899A SG 70001 A1 SG70001 A1 SG 70001A1
Authority
SG
Singapore
Prior art keywords
pattern generation
disk file
propagation pattern
radial self
servowriting
Prior art date
Application number
SG1997000899A
Other languages
English (en)
Inventor
Edward John Yarmchuk
Mark D Schultz
Bucknell C Webb
Timothy Joseph Chainer
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
Priority claimed from US08/349,028 external-priority patent/US5612833A/en
Application filed by Ibm filed Critical Ibm
Publication of SG70001A1 publication Critical patent/SG70001A1/en

Links

Classifications

    • 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
    • G11B21/106—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 on 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
    • 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
    • G11B5/58—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
    • 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
SG1997000899A 1994-12-02 1995-11-10 Radial self-propagation pattern generation for disk file servowriting SG70001A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/349,028 US5612833A (en) 1994-12-02 1994-12-02 Radial self-propagation pattern generation for disk file servowriting
US08/405,261 US5659436A (en) 1994-12-02 1995-03-16 Radial self propagation pattern generation for disk file servowriting

Publications (1)

Publication Number Publication Date
SG70001A1 true SG70001A1 (en) 2000-01-25

Family

ID=26996008

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1997000899A SG70001A1 (en) 1994-12-02 1995-11-10 Radial self-propagation pattern generation for disk file servowriting

Country Status (9)

Country Link
US (1) US5907447A (zh)
EP (1) EP0715299B1 (zh)
JP (1) JP3083747B2 (zh)
CN (1) CN1090789C (zh)
BR (1) BR9505547A (zh)
CA (1) CA2163689C (zh)
DE (1) DE69507579T2 (zh)
MY (1) MY115997A (zh)
SG (1) SG70001A1 (zh)

Families Citing this family (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5793554A (en) * 1996-07-09 1998-08-11 International Business Machines Corporation Self-servowriting system with dynamic error propagation reduction
JPH1166776A (ja) * 1997-08-18 1999-03-09 Fujitsu Ltd ディスク装置、サーボトラックライトシステムおよびそのサーボトラックライト方法
US6163814A (en) 1997-11-25 2000-12-19 Stmicroelectronics N.V. High speed servo data interface system for transferring high resolution servo position data through a data bus
US6320711B2 (en) 1997-11-25 2001-11-20 Stmicroelectronics N.V. High-speed unified data interface for a read channel in a disk drive system
US6153997A (en) * 1998-01-13 2000-11-28 Hitachi, Ltd. Disk apparatus and method of controlling disk apparatus
US6606216B1 (en) * 1999-05-05 2003-08-12 Maxtor Corporation Transducer head with separate data and servo read elements
US6441986B1 (en) * 1999-09-07 2002-08-27 Iomega Corporation System and method for minimizing write-over encroachment in a disk due to radial sinusoidal runout at the fundamental frequency
US6611395B1 (en) * 1999-11-03 2003-08-26 Hitachi Global Storage Technologies Netherlands B.V. Rotating media recording system with adaptive track density
US6611391B1 (en) 1999-12-03 2003-08-26 Seagate Technology Llc Variable format timing runout compensation
US6704156B1 (en) * 2000-01-31 2004-03-09 Maxtor Corporation Self-writing of servo patterns in a disk drive using a printed reference pattern
US6600620B1 (en) 2000-03-31 2003-07-29 Western Digital Technologies, Inc. Self-servo writing a disk drive by propagating interleaved sets of timing clocks and servo bursts during alternate time intervals
US6693760B1 (en) 2000-03-31 2004-02-17 Western Digital Technologies, Inc. Preamplifier circuit configurable to allow simultaneous read and write operations for self-servo writing a disk drive
US6798610B1 (en) * 2000-04-24 2004-09-28 Maxtor Corporation Disk drive with self servo writing capability
US6493176B1 (en) * 2000-04-24 2002-12-10 Maxtor Corporation Disk drive with variable TPI servo tracks
US6603627B1 (en) * 2000-05-31 2003-08-05 Hitachi Global Storage Technologies Netherlands B.V. Creating an initial set of tracks in a self-servowriting system using a compliant crashstop to control head movement
US6600621B1 (en) 2000-05-31 2003-07-29 Hitachi Global Storage Technologies Netherlands B.V. Techniques for multitrack positioning and controlling error growth in self-servowriting systems
US6429989B1 (en) 2000-06-13 2002-08-06 International Business Machines Corporation Method for self-servowriting timing propagation
SG104270A1 (en) * 2000-06-14 2004-06-21 Seagate Technology Llc Feed-forward compensation of cage frequency using a reference head in a servo-writer
US20020036858A1 (en) * 2000-09-27 2002-03-28 Seagate Technology Llc Writing servo sectors to a disc drive using offset heads
US6954325B2 (en) * 2000-09-28 2005-10-11 Seagate Technology Llc Method and disc drive for writing servo wedges
JP2004527865A (ja) 2000-10-24 2004-09-09 シーゲイト テクノロジー エルエルシー ディスク駆動機構上にサーボおよびクロック・フィールドの自己書込みを行う回路
US6735031B2 (en) 2001-01-31 2004-05-11 Hitachi Global Storage Technologies Netherlands B.V. Method for storage of self-servowriting timing information
US6654196B2 (en) * 2001-03-20 2003-11-25 Hitachi Global Storage Technologies Netherlands B.V. Avoiding write to read interference during self-servowriting
US6765744B2 (en) 2001-03-30 2004-07-20 Kevin Arthur Gomez Track pitch control using head offset measurement for self-servowriting tracks in a disc drive
US7161759B1 (en) 2001-04-19 2007-01-09 Maxtor Corporation Self servo writing using servo burst edge errors for compound error correction
JP2002367308A (ja) 2001-06-06 2002-12-20 Hitachi Ltd 磁気ディスク装置およびサーボライト方法
US7050260B1 (en) * 2001-11-09 2006-05-23 Maxtor Corporation Method and apparatus for partial self-servo writing using servo wedge propagation
US7126780B2 (en) * 2002-04-09 2006-10-24 Hitachi Global Storage Technologies Netherlands B.V. Method, system, and article of manufacture for self-servowriting a disk
US20030197969A1 (en) * 2002-04-18 2003-10-23 Gabor Szita Controlling low frequency track shape errors in hard disc drives employing self-propagated servo track writing
US7019926B2 (en) * 2002-06-27 2006-03-28 Hitachi Global Storage Technologies Netherlands B.V. Self-servo-writing multi-slot timing pattern
JP2004063043A (ja) 2002-07-31 2004-02-26 Toshiba Corp サーボライタ装置及びサーボライト方法
US6924961B1 (en) 2002-08-30 2005-08-02 Western Digital Technologies, Inc. Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model
US6819518B1 (en) 2002-10-24 2004-11-16 Western Digital Technologies, Inc. Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional digital state compensator
US7089353B2 (en) * 2002-12-18 2006-08-08 Hitachi Global Technologies Netherlands, B.V. Radial self-propagation pattern generation for disk file servowriting
WO2004075176A1 (en) * 2003-02-14 2004-09-02 Bill Richard Baker Compound phase encoding for printed servo patterns
US20050034539A1 (en) * 2003-08-14 2005-02-17 Tan Leeling Motor torque variation compensation
JP2005078786A (ja) * 2003-09-04 2005-03-24 Hitachi Global Storage Technologies Inc 磁気ディスク装置及びそのためのサーボパターン記録方法
US7307807B1 (en) 2003-09-23 2007-12-11 Marvell International Ltd. Disk servo pattern writing
US6999263B1 (en) 2003-10-24 2006-02-14 Western Digital Technologies, Inc. Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional weighted digital state compensator
JP2005135530A (ja) 2003-10-30 2005-05-26 Toshiba Corp ヘッド位置決め制御システム、ディスク記憶装置及びサーボ書き込み方法
JP2005190509A (ja) 2003-12-24 2005-07-14 Toshiba Corp サーボライト方法及びディスク記憶装置
KR100532499B1 (ko) * 2004-01-30 2005-11-30 삼성전자주식회사 하드디스크 드라이브의 서보 버스트 신호 검사 방법 및이에 적합한 기록 매체
US7457075B2 (en) 2004-02-24 2008-11-25 Seagate Technology Llc System and method for reducing ZAP time and track squeeze in a data storage device
KR100604863B1 (ko) * 2004-05-29 2006-07-26 삼성전자주식회사 헤드의 진동에 의한 영향을 회피하기 위한 하드디스크 드라이브의 기록 제어 방법 및 이에 적합한 장치
US7209312B1 (en) 2004-07-15 2007-04-24 Marvell International Ltd. Self-servo-write using ramp-tracks
US7751144B1 (en) 2004-07-15 2010-07-06 Marvell International Ltd. Self-servo-write using ramp-tracks
US7253984B1 (en) * 2004-09-02 2007-08-07 Maxtor Corporation Disk drive that generates a position error signal and a fly height signal from a servo burst pattern
US7215514B1 (en) 2004-10-22 2007-05-08 Western Digital Technologies, Inc. Method of operating a disk drive including rotating a perpendicular write head to reduce a difference between skew and taper angles, and a disk drive
US7489464B1 (en) 2005-02-02 2009-02-10 Western Digital Technologies, Inc. Servo writing a disk drive using a secondary actuator to control skew angle
JP4368332B2 (ja) 2005-05-20 2009-11-18 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 記録ディスクへのパターン書き込み方法及びデータ記憶装置
US7486467B2 (en) 2005-11-28 2009-02-03 Hitachi Global Storage Technologies Netherlands B.V. Magnetic disk drive and method for registering defective sector using timing control of pattern writing
US7349171B2 (en) * 2006-03-06 2008-03-25 Marvell World Trade Ltd. Method for measuring actuator velocity during self-servo-write
JP4316580B2 (ja) 2006-03-28 2009-08-19 株式会社東芝 磁気記録装置およびサーボ情報記録方法
US7511913B2 (en) * 2006-04-20 2009-03-31 Hitachi Global Storage Technologies Netherlands B.V. Stable time domain radial self-servo write propagation
US7502192B1 (en) 2006-07-11 2009-03-10 Western Digital Technologies, Inc. Magnetic disk drive and method for efficiently determining and storing RRO compensation values using a secondary micro-actuator
JP2008052807A (ja) 2006-08-23 2008-03-06 Hitachi Global Storage Technologies Netherlands Bv ディスクへパターンを書き込む方法、ディスク上のトラックをフォローイングする方法及びディスクへパターンを書き込む装置
US8926228B2 (en) 2006-09-08 2015-01-06 Ben Stroyer Auger grouted displacement pile
US7773334B1 (en) 2006-12-06 2010-08-10 Marvell International Ltd. Single-pass spiral self-servo-write
JP2008165918A (ja) * 2006-12-28 2008-07-17 Fujitsu Ltd サーボパターン書き込み装置、サーボパターン書き込み方法、サーボパターン読み取り装置、サーボパターン読み取り方法
US7663835B1 (en) * 2007-06-28 2010-02-16 Western Digital Technologies, Inc. System and method for identifying track squeeze errors (TSEs) of a disk of a disk drive
US7639447B1 (en) 2008-02-18 2009-12-29 Western Digital Technologies, Inc. Servo track squeeze compensation in a disk drive
US7602575B1 (en) 2008-05-14 2009-10-13 Western Digital Technologies, Inc. Disk drive adjusting estimated reader/writer offset to achieve target burst crossing signal amplitude when propagating servo sectors
US7688539B1 (en) 2008-05-14 2010-03-30 Western Digital Technologies, Inc. Disk drive self servo writing spiral tracks by propagating bursts
JP2011123966A (ja) 2009-12-12 2011-06-23 Hitachi Global Storage Technologies Netherlands Bv ディスクへサーボ・ライト・トラックを書き込む方法及びディスク・ドライブ
US8743495B1 (en) 2011-06-03 2014-06-03 Western Digital Technologies, Inc. Disk drive detecting track squeeze when circular tracks are defined from non-circular servo tracks
US8717704B1 (en) 2012-02-28 2014-05-06 Western Digital Technologies, Inc. Disk drive defining non-circular data tracks relative to a rotation axis of the disk
US8749904B1 (en) 2012-02-28 2014-06-10 Western Digital Technologies, Inc. Disk drive compensating for track squeeze by writing non-circular servo tracks
US8670206B1 (en) 2012-03-27 2014-03-11 Western Digital Technologies, Inc. Disk drive estimating repeatable runout of reference pattern based on repeatable runout of phase error
US8929021B1 (en) 2012-03-27 2015-01-06 Western Digital Technologies, Inc. Disk drive servo writing from spiral tracks using radial dependent timing feed-forward compensation
US8724253B1 (en) 2012-03-27 2014-05-13 Western Digital Technologies, Inc. Disk drive adjusting demodulation window for spiral track using timing feed-forward compensation
CN103218582A (zh) * 2013-03-25 2013-07-24 国家电网公司 一种电表卡加密机故障判定方法
US8917475B1 (en) 2013-12-20 2014-12-23 Western Digital Technologies, Inc. Disk drive generating a disk locked clock using radial dependent timing feed-forward compensation
US10030961B2 (en) 2015-11-27 2018-07-24 General Electric Company Gap measuring device
US11725357B2 (en) 2018-10-21 2023-08-15 Benjamin G. Stroyer Deformed pile shaft for providing gripping contact with a supporting medium and resisting the supporting medium from shearing
CN114067847B (zh) * 2020-08-07 2023-08-11 株式会社东芝 磁盘装置以及磁盘装置的滤波器系数设定方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881184A (en) * 1974-05-28 1975-04-29 Ibm Adaptive digital servo system
US4414589A (en) * 1981-12-14 1983-11-08 Northern Telecom Inc. Embedded servo track following system and method for writing servo tracks
JPH0743839B2 (ja) * 1985-01-25 1995-05-15 株式会社日立製作所 デイスク再生装置
US4912576A (en) * 1985-11-20 1990-03-27 Magnetic Peripherals Inc. Method for writing a servo pattern
WO1994011864A1 (en) * 1992-11-10 1994-05-26 Hardisk Technology Self-servowriting disk drive and method
US5541784A (en) * 1992-11-10 1996-07-30 Daniel F. Cribbs Bootstrap method for writing servo tracks on a disk drive
US6215606B1 (en) * 1993-03-08 2001-04-10 International Business Machines Corporation Method and system for determining the widest recording head of a recording device
JPH07256917A (ja) * 1994-03-18 1995-10-09 Hitachi Ltd 画像形成方法及び画像形成装置
US5612833A (en) * 1994-12-02 1997-03-18 International Business Machines Corporation Radial self-propagation pattern generation for disk file servowriting

Also Published As

Publication number Publication date
DE69507579D1 (de) 1999-03-11
CN1136206A (zh) 1996-11-20
DE69507579T2 (de) 1999-08-12
CA2163689C (en) 2003-02-18
US5907447A (en) 1999-05-25
JP3083747B2 (ja) 2000-09-04
BR9505547A (pt) 1997-11-04
JPH08212733A (ja) 1996-08-20
CA2163689A1 (en) 1996-06-03
MY115997A (en) 2003-10-31
EP0715299B1 (en) 1999-01-27
CN1090789C (zh) 2002-09-11
EP0715299A2 (en) 1996-06-05
EP0715299A3 (en) 1996-08-14

Similar Documents

Publication Publication Date Title
SG34301A1 (en) Radial self-propagation pattern generation for disk file servowriting
SG70001A1 (en) Radial self-propagation pattern generation for disk file servowriting
SG52990A1 (en) Improvements to radial self-propagation pattern generation for disk file servowriting
GB2310255B (en) A turbomachine
EP0690206A3 (de) Diffusor für Turbomaschine
EP0789149A4 (en) SYSTEM FOR DESIGNING A MULTI-BLADE RADIAL TURBINE AND MULTILAME RADIAL TURBINE
GB2286431B (en) Turbomachine rotor
ZA974723B (en) Radial cooling
GB2293212B (en) Rotor for a turbomachine
HK1016735A1 (en) Disk replaying apparatus
DE69921767D1 (de) Plattenwiedergabegerät
AU1088799A (en) Multiple catalyst bed radial flow reactor
NO992401D0 (no) Ny fremgangsmÕte for fremstilling av metoprolol
EP0846911A4 (en) CATALYTIC COMBUSTION CHAMBER
AU7914398A (en) Silencer casing and pertaining catalyst support with a retaining element and method for the production thereof
GB2311826B (en) Turbomachines
DE69919937D1 (de) Plattenwiedergabegerät
EP0684603A3 (en) Disc device.
DE69905095D1 (de) Plattenwiedergabegerät
GB9814410D0 (en) Radial tyre
EP0673132A3 (en) Clock converter for asynchronous data.
GB9514310D0 (en) An arrangement for connecting two turbine rotor discs
HUP0000415A3 (en) Biologocal disk
DE69716258T2 (de) Dampfturbine
HK1005273A1 (en) Disk casing