JPH1172520A5 - - Google Patents

Info

Publication number
JPH1172520A5
JPH1172520A5 JP1998147474A JP14747498A JPH1172520A5 JP H1172520 A5 JPH1172520 A5 JP H1172520A5 JP 1998147474 A JP1998147474 A JP 1998147474A JP 14747498 A JP14747498 A JP 14747498A JP H1172520 A5 JPH1172520 A5 JP H1172520A5
Authority
JP
Japan
Prior art keywords
noise
measurements
measure
loop
storage device
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.)
Pending
Application number
JP1998147474A
Other languages
English (en)
Japanese (ja)
Other versions
JPH1172520A (ja
Filing date
Publication date
Priority claimed from US08/866,367 external-priority patent/US5909661A/en
Application filed filed Critical
Publication of JPH1172520A publication Critical patent/JPH1172520A/ja
Publication of JPH1172520A5 publication Critical patent/JPH1172520A5/ja
Pending legal-status Critical Current

Links

JP10147474A 1997-05-30 1998-05-28 データ記憶装置のノイズを測定する方法 Pending JPH1172520A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US866,367 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
JPH1172520A JPH1172520A (ja) 1999-03-16
JPH1172520A5 true JPH1172520A5 (enExample) 2005-04-07

Family

ID=25347459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10147474A Pending JPH1172520A (ja) 1997-05-30 1998-05-28 データ記憶装置のノイズを測定する方法

Country Status (4)

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

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USRE40413E1 (en) * 1998-11-06 2008-07-01 Purchased Patent Management Llc Method and apparatus for developing a dynamic servo signal from data
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
US6618219B1 (en) 1999-10-12 2003-09-09 Seagate Technology Llc Method and apparatus for feedforward cancellation using a peak detector
US6628472B1 (en) * 1999-10-12 2003-09-30 Seagate Technoogy Llc Method and apparatus for feedforward cancellation using a phase lock loop
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
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
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
US6654198B2 (en) 2000-08-23 2003-11-25 Seagate Technology Llc Repeatable run-out error compensation method for a disc drive
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
SG125068A1 (en) 2001-09-11 2006-09-29 Seagate Technology Llc Method for sensing run-out in data fields
US7027251B1 (en) 2002-01-04 2006-04-11 Maxtor Corporation Method and apparatus to control pole tip protrusion
US7224548B1 (en) * 2002-01-04 2007-05-29 Maxtor Corporation Determining contact write current in disk drive using position error signal variance
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
EP1844466A2 (en) * 2005-01-21 2007-10-17 Koninklijke Philips Electronics N.V. Disc drive apparatus with non-linear observer
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
CN119375643B (zh) * 2024-12-30 2025-03-28 南京浦镇海通铁路设备有限公司 一种绝缘检测功能的检测方法及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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