TW200511236A - Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function - Google Patents
Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a functionInfo
- Publication number
- TW200511236A TW200511236A TW093121151A TW93121151A TW200511236A TW 200511236 A TW200511236 A TW 200511236A TW 093121151 A TW093121151 A TW 093121151A TW 93121151 A TW93121151 A TW 93121151A TW 200511236 A TW200511236 A TW 200511236A
- Authority
- TW
- Taiwan
- Prior art keywords
- magnetic disk
- flying height
- function
- disk drive
- height management
- Prior art date
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
- G11B21/16—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
- 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
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
- G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
- G11B5/3136—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials
-
- 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
- G11B5/6011—Control of flying height
- G11B5/607—Control of flying height using thermal means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Digital Magnetic Recording (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003303828A JP4223897B2 (ja) | 2003-08-28 | 2003-08-28 | 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。 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200511236A true TW200511236A (en) | 2005-03-16 |
Family
ID=34191239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW093121151A TW200511236A (en) | 2003-08-28 | 2004-07-15 | Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function |
Country Status (7)
Country | Link |
---|---|
US (1) | US7330324B2 (zh) |
EP (1) | EP1517307A1 (zh) |
JP (1) | JP4223897B2 (zh) |
KR (1) | KR20050021898A (zh) |
CN (1) | CN1308957C (zh) |
SG (1) | SG109594A1 (zh) |
TW (1) | TW200511236A (zh) |
Families Citing this family (48)
Publication number | Priority date | Publication date | Assignee | Title |
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US7502205B1 (en) * | 2003-06-05 | 2009-03-10 | Maxtor Corporation | Method of operating read and write transducers by controlling thermal actuation |
JP2005251312A (ja) * | 2004-03-04 | 2005-09-15 | Tdk Corp | 磁気ヘッドドライブ回路及び磁気ディスク装置 |
US7190547B2 (en) * | 2004-12-30 | 2007-03-13 | Samsung Electronics Co., Ltd. | Methods for detecting contact between a read-write head and the accessed disk surface in a hard disk drive |
JP4979894B2 (ja) * | 2005-03-25 | 2012-07-18 | 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 | 磁気ディスク装置 |
JP4895560B2 (ja) * | 2005-09-22 | 2012-03-14 | 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 | データ記憶装置 |
US7342736B1 (en) * | 2005-10-07 | 2008-03-11 | Maxtor Corporation | Methods and disk drive that measure head flying height at power-on/off |
US7215495B1 (en) | 2005-12-27 | 2007-05-08 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for determining head-disk contact in a magnetic recording disk drive |
US7180692B1 (en) | 2005-12-27 | 2007-02-20 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for calibrating and controlling a fly-height actuator in a magnetic recording disk drive |
US7280305B2 (en) * | 2006-01-13 | 2007-10-09 | Samsung Electronics Co., Ltd. | Method and apparatus for estimating and controlling the flying height of a read-write head in a hard disk drive |
US7573668B2 (en) * | 2006-01-16 | 2009-08-11 | Samsung Electronics Co., Ltd. | Method and apparatus for sensing leakage current to estimate and possibly adjust flying height of a read-write head in a hard disk drive |
US7292401B2 (en) | 2006-03-14 | 2007-11-06 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for determining head-disk contact in a magnetic recording disk drive by magnetoresistive signal amplitude |
JP4379814B2 (ja) | 2006-03-28 | 2009-12-09 | 富士通株式会社 | 記憶装置、制御方法、制御装置及びプログラム |
JP4439483B2 (ja) * | 2006-03-28 | 2010-03-24 | 東芝ストレージデバイス株式会社 | 記憶装置、制御装置、制御方法及びプログラム |
US7558015B2 (en) * | 2006-03-29 | 2009-07-07 | Maxtor Corporation | Actuation efficiency based contact detection |
JP2007310978A (ja) | 2006-05-19 | 2007-11-29 | Fujitsu Ltd | ヘッド浮上量制御方法及び装置、記憶装置及びプログラム |
JP4908106B2 (ja) | 2006-08-18 | 2012-04-04 | 東芝ストレージデバイス株式会社 | 記憶装置、制御方法、制御装置及びプログラム |
US20080055772A1 (en) * | 2006-09-01 | 2008-03-06 | Mcmillan Chris | Method and apparatus for predicting contact of a read-write head in a hard disk drive |
JP2008071417A (ja) | 2006-09-14 | 2008-03-27 | Fujitsu Ltd | 記憶装置、制御方法及び制御回路 |
US8405927B2 (en) * | 2006-10-02 | 2013-03-26 | HGST Netherlands B.V. | Apparatus and method for detecting low flying sliders |
JP4728929B2 (ja) | 2006-10-31 | 2011-07-20 | 東芝ストレージデバイス株式会社 | 制御装置、制御方法及び記憶装置 |
DE102006053398A1 (de) * | 2006-11-10 | 2008-05-15 | Endress + Hauser Gmbh + Co. Kg | Elektronisches Gerät |
JP4805860B2 (ja) | 2007-02-05 | 2011-11-02 | 東芝ストレージデバイス株式会社 | 浮上量測定装置、記憶装置および浮上量測定方法 |
KR100856127B1 (ko) | 2007-02-12 | 2008-09-03 | 삼성전자주식회사 | 하드디스크 드라이브, ta 시그널을 이용한 하드디스크드라이브의 fod 제어방법 및 그 방법을 수행하는 컴퓨터프로그램을 기록한 기록매체 |
JP2008243249A (ja) | 2007-03-26 | 2008-10-09 | Fujitsu Ltd | 記憶装置ならびに記憶装置の制御装置 |
JP2008243288A (ja) * | 2007-03-27 | 2008-10-09 | Fujitsu Ltd | 磁気記憶装置、制御装置及び浮上量制御方法 |
KR100897561B1 (ko) | 2007-04-27 | 2009-05-15 | 삼성전자주식회사 | 하드디스크 드라이브, 하드디스크 드라이브의 자기 헤드의부상높이 제어 방법 및 그 방법을 수행하는 컴퓨터프로그램을 기록한 기록매체 |
US8665562B2 (en) * | 2007-11-13 | 2014-03-04 | Emc Corporation | Method of reliable usage of dynamic fly-height control at environmental extremes |
JP2009199660A (ja) * | 2008-02-21 | 2009-09-03 | Fujitsu Ltd | 磁気記録媒体の媒体欠陥検出方法及び磁気記憶装置 |
JP4836282B2 (ja) | 2008-06-12 | 2011-12-14 | 東芝ストレージデバイス株式会社 | ヘッド浮上量調整方法及び書き込み電流値決定方法、並びに記憶装置 |
JP2010033671A (ja) * | 2008-07-30 | 2010-02-12 | Toshiba Storage Device Corp | 磁気ディスク装置および磁気ヘッドの突き出し量制御方法 |
JP2010061740A (ja) * | 2008-09-04 | 2010-03-18 | Toshiba Storage Device Corp | 浮上変動量測定方法、磁気記憶装置 |
US7830634B2 (en) * | 2008-12-23 | 2010-11-09 | Hitachi Global Storage Technologies Netherlands, B.V. | Head-disk contact detection and work function difference determination |
US7719786B1 (en) * | 2008-12-23 | 2010-05-18 | Hitachi Global Storage Technologies Netherlands B.V. | Active fly height control using radio frequency feedback |
US8879188B1 (en) | 2010-08-23 | 2014-11-04 | Western Digital Technologies, Inc. | Disk drive employing fly height calibration tracks to account for magnetic entropy and thermal decay |
US8773802B1 (en) | 2010-08-24 | 2014-07-08 | Western Digital Technologies, Inc. | Disk drive resetting fly height reference generated from a degrading calibration track |
US8885279B1 (en) | 2010-08-30 | 2014-11-11 | Western Digital Technologies, Inc. | Disk drive detecting head/disk contact by evaluating a subset of touchdown metrics during a servo sector interrupt |
JP5805999B2 (ja) * | 2011-05-25 | 2015-11-10 | レノボ・シンガポール・プライベート・リミテッド | 磁気記録装置、その診断方法、及びコンピュータが実行可能なプログラム |
US8654466B1 (en) | 2011-11-21 | 2014-02-18 | Western Digital Technologies, Inc. | Calculation of head media separation (HMS) from servo preamble in a hard disk drive |
US8982502B2 (en) * | 2011-12-12 | 2015-03-17 | HGST Netherlands B.V. | Hard disk drive with write assist based on detected conditions |
US8730612B1 (en) | 2011-12-16 | 2014-05-20 | Western Digital Technologies, Inc. | Disk drive evaluating ratio of fly height setting for first and second heads to verify operability |
US8824081B1 (en) | 2012-03-13 | 2014-09-02 | Western Digital Technologies, Inc. | Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement |
US8699159B1 (en) | 2012-06-18 | 2014-04-15 | Western Digital Technologies, Inc. | Reducing effects of wide area track erasure in a disk drive |
US8773807B1 (en) | 2012-07-24 | 2014-07-08 | Western Digital Technologies, Inc. | Disk drive calibrating fly height during startup by reading spacing pattern in servo sectors |
US9053749B1 (en) | 2013-03-15 | 2015-06-09 | Western Digital Technologies, Inc. | Disk drive comprising a per-drive and per-head fly height filter |
US9025269B1 (en) | 2014-01-02 | 2015-05-05 | Western Digital Technologies, Inc. | Disk drive compensating for cycle slip of disk locked clock when reading mini-wedge |
US8976633B1 (en) | 2014-04-15 | 2015-03-10 | Western Digital Technologies, Inc. | Data storage device calibrating fly height actuator based on laser power for heat assisted magnetic recording |
US10311905B1 (en) * | 2018-03-27 | 2019-06-04 | Seagate Technology Llc | Methods, devices, and systems for establishing fly-height parameters for hard disk drives |
US10699736B1 (en) * | 2019-07-22 | 2020-06-30 | Western Digital Technologies, Inc. | Data storage device detecting abnormality with a write assist element based on slope of protrusion |
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US4414589A (en) * | 1981-12-14 | 1983-11-08 | Northern Telecom Inc. | Embedded servo track following system and method for writing servo tracks |
US4841389A (en) | 1987-06-11 | 1989-06-20 | International Business Machines Corporation | Magnetic transducer crash anticipation and response method and apparatus |
US5168413A (en) * | 1990-11-30 | 1992-12-01 | Ibm Corporation | Transducer head flying height monitoring methods and apparatus for disk drive system |
US5527110A (en) | 1993-04-30 | 1996-06-18 | International Business Machines Corporation | Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging |
US5810477A (en) * | 1993-04-30 | 1998-09-22 | International Business Machines Corporation | System for identifying surface conditions of a moving medium |
US5594595A (en) * | 1995-01-19 | 1997-01-14 | Conner Peripherals, Inc. | FM detection of slider-disk interface |
JP3199996B2 (ja) | 1995-11-15 | 2001-08-20 | 株式会社東芝 | ディスク記録再生システム及びそのヘッド浮上変動検出方法 |
US5701314A (en) | 1995-12-21 | 1997-12-23 | Cirrus Logic, Inc. | On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive |
US5909330A (en) | 1996-12-12 | 1999-06-01 | Maxtor Corporation | Method and apparatus for detecting head flying height in a disk drive |
US5991113A (en) * | 1997-04-07 | 1999-11-23 | Seagate Technology, Inc. | Slider with temperature responsive transducer positioning |
US6239936B1 (en) * | 1997-08-19 | 2001-05-29 | International Business Machines Corporation | Method and apparatus for calibrating a thermal response of a magnetoresistive element |
US6119261A (en) | 1998-03-17 | 2000-09-12 | Quantum Corporation | Method for recovering data from disk with a dynamic erasure offset ECC data recovery protocol |
US6366416B1 (en) | 2000-02-03 | 2002-04-02 | Seagate Technology Llc | Glide test head with active fly height control |
US6195219B1 (en) * | 1998-10-20 | 2001-02-27 | International Business Machines Corporation | Method and apparatus for improving a thermal response of a magnetoresistive element |
US6501611B1 (en) * | 1999-04-27 | 2002-12-31 | International Business Machines Corporation | Data recovery apparatus, method and memory medium for a magnetic memory read/write channel |
US6741524B2 (en) * | 1999-12-28 | 2004-05-25 | Kabushiki Kaisha Toshiba | Thermally-assisted magnetic recording and reproducing device having an electron beam thermal source |
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 |
JP2005501358A (ja) * | 2001-08-22 | 2005-01-13 | シーゲイト テクノロジー エルエルシー | 静電飛行高度制御システム及び方法 |
US7027263B2 (en) * | 2002-05-07 | 2006-04-11 | Hitachi Global Storage Technologies Netherlands B.V. | Apparatus for look-ahead thermal sensing in a data storage device |
KR100468766B1 (ko) * | 2002-09-19 | 2005-01-29 | 삼성전자주식회사 | 헤드와 디스크간의 플라잉 높이를 제어하기 위한 방법 및그 제어장치 |
US6950266B1 (en) * | 2002-10-28 | 2005-09-27 | Western Digital (Fremont), Inc. | Active fly height control crown actuator |
KR100468779B1 (ko) * | 2002-12-13 | 2005-01-29 | 삼성전자주식회사 | 자기 헤드의 tptp 특성 측정 방법 및 이에 적합한기록 전류 제어 방법 |
US6947246B2 (en) * | 2003-08-29 | 2005-09-20 | Hitachi Global Storage Technologies Netherlands, B.V. | Large protrusion recording head for controlled magnetic spacing recording/reading |
US6950267B1 (en) * | 2003-10-31 | 2005-09-27 | Western Digital Technologies, Inc. | Disk drive measuring pole tip protrusion by performing a write operation to heat the transducer |
JP2005251312A (ja) * | 2004-03-04 | 2005-09-15 | Tdk Corp | 磁気ヘッドドライブ回路及び磁気ディスク装置 |
-
2003
- 2003-08-28 JP JP2003303828A patent/JP4223897B2/ja not_active Expired - Fee Related
-
2004
- 2004-07-12 US US10/890,073 patent/US7330324B2/en not_active Expired - Fee Related
- 2004-07-15 TW TW093121151A patent/TW200511236A/zh unknown
- 2004-08-25 SG SG200404789A patent/SG109594A1/en unknown
- 2004-08-26 CN CNB2004100579025A patent/CN1308957C/zh not_active Expired - Fee Related
- 2004-08-27 EP EP04255179A patent/EP1517307A1/en not_active Withdrawn
- 2004-08-27 KR KR1020040067872A patent/KR20050021898A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
JP4223897B2 (ja) | 2009-02-12 |
JP2005071546A (ja) | 2005-03-17 |
KR20050021898A (ko) | 2005-03-07 |
CN1308957C (zh) | 2007-04-04 |
SG109594A1 (en) | 2005-03-30 |
US7330324B2 (en) | 2008-02-12 |
US20050046985A1 (en) | 2005-03-03 |
CN1591662A (zh) | 2005-03-09 |
EP1517307A1 (en) | 2005-03-23 |
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