JP2004055136A - 磁気ヘッドの磁気記録幅測定方法およびその装置 - Google Patents
磁気ヘッドの磁気記録幅測定方法およびその装置 Download PDFInfo
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- JP2004055136A JP2004055136A JP2003275931A JP2003275931A JP2004055136A JP 2004055136 A JP2004055136 A JP 2004055136A JP 2003275931 A JP2003275931 A JP 2003275931A JP 2003275931 A JP2003275931 A JP 2003275931A JP 2004055136 A JP2004055136 A JP 2004055136A
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- Prior art keywords
- track
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- burst pattern
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- 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
- G11B5/09—Digital recording
-
- 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
- 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
-
- 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
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
-
- 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
Abstract
【解決手段】 磁気ディスクで目標トラックを検索してバーストパターンを記録する第1の工程と,目標トラックに接するトラックに対して目標トラック方向に所定の比率だけオフトラックしてバーストパターンを記録する第2の工程と,ディスクの半径方向に磁気ヘッドを移動させて磁気ヘッドの出力信号を測定してオフトラックプロファイルを生成する第3の工程と,オフトラックプロファイルから目標トラックの振幅減少比率を測定して振幅減少比率に該当する磁気記録幅を算定する第4の工程と,を含むことを特徴とし,これにより,単品段階のテスト省略によるコスト節減をもたらし,またHDD環境でヘッドのMWWに合う適切な容量設計をより容易に設定できる。
【選択図】 図2
Description
210 記録電流設定部
220 パターン記録部
230 プロファイル構成部
240 データベース
250 MWW測定部
251 磁気ディスク
253 スピンドル
255 駆動装置
257 磁気ヘッド
Claims (6)
- 磁気ディスクで目標トラックを検索してバーストパターンを記録する第1の工程と,
前記目標トラックに接するトラックに対して前記目標トラック方向に所定の比率だけオフトラックしてバーストパターンを記録する第2の工程と,
前記ディスクの半径方向に磁気ヘッドを移動させて前記磁気ヘッドの出力信号を測定してオフトラックプロファイルを生成する第3の工程と,
前記オフトラックプロファイルから前記目標トラックの振幅減少比率を測定して前記振幅減少比率に該当する磁気記録幅を算定する第4の工程と,を含むことを特徴とする,バーストパターンの利用による磁気ヘッドの磁気記録幅測定方法。 - 前記第4の工程は,
前記オフトラックプロファイルから各トラックに対するヘッドの出力信号に対する最大振幅を求める第5の工程と,
前記目標トラックの振幅減少比率を計算する第6の工程と,
前記振幅減少比率に該当する磁気記録幅を算定する第7の工程と,を含むことを特徴とする,請求項1に記載のバーストパターンの利用による磁気ディスクの磁気記録幅測定方法。 - 磁気ディスクのトラックにバーストパターンを記録するバーストパターン記録部と,
前記磁気ディスクの半径方向に磁気ヘッドの出力信号を測定してオフトラックプロファイルを生成するプロファイル生成部と,
前記オフトラックプロファイルから目標トラックの振幅減少比率を測定して前記振幅減少比率に該当する磁気記録幅を算定する磁気記録幅測定部と,を含むことを特徴とする,バーストパターンの利用による磁気ディスクの磁気記録幅測定装置。 - 前記振幅減少比率を測定して磁気記録幅を算定したデータを貯蔵するデータベースをさらに含むことを特徴とする,請求項4に記載のバーストパターンの利用による磁気ディスクの磁気記録幅測定装置。
- 請求項1から3のうちいずれかの方法をコンピュータにて実行させるためのプログラムを記録したことを特徴とする,コンピュータにて読取れる記録媒体。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-0041989A KR100455391B1 (ko) | 2002-07-18 | 2002-07-18 | 버스트 패턴을 이용하여 자기헤드의 자기기록폭을측정하는 방법 및 그 장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004055136A true JP2004055136A (ja) | 2004-02-19 |
JP3909044B2 JP3909044B2 (ja) | 2007-04-25 |
Family
ID=29775026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003275931A Expired - Fee Related JP3909044B2 (ja) | 2002-07-18 | 2003-07-17 | 磁気ヘッドの磁気記録幅測定方法およびその装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6992849B2 (ja) |
EP (1) | EP1383114B1 (ja) |
JP (1) | JP3909044B2 (ja) |
KR (1) | KR100455391B1 (ja) |
DE (1) | DE60326521D1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100459718B1 (ko) * | 2002-08-28 | 2004-12-03 | 삼성전자주식회사 | 하드 디스크 드라이브에 있어서 헤드의 자기 기록폭을 측정하는 프로그램이 기록된 기록 매체 |
US8261062B2 (en) * | 2003-03-27 | 2012-09-04 | Microsoft Corporation | Non-cryptographic addressing |
JP2005276352A (ja) * | 2004-03-25 | 2005-10-06 | Fuji Photo Film Co Ltd | 磁気記録媒体およびその製造方法、その製造方法において用いられる磁気転写用パターンドマスター担体、ならびに磁気記録再生装置 |
US7567397B2 (en) * | 2006-09-11 | 2009-07-28 | Hitachi Global Storage Technologies Netherlands B.V. | Adjacent Track Interference (ATI) identification methodology |
US7529050B2 (en) * | 2006-10-18 | 2009-05-05 | Hitachi Global Storage Technologies Netherlands B.V. | Track width measurement for magnetic recording heads |
US7982989B1 (en) * | 2009-12-23 | 2011-07-19 | Western Digital (Fremont), Llc | Method and system for measuring magnetic interference width |
US8970980B1 (en) | 2011-06-27 | 2015-03-03 | Western Digital Technologies, Inc. | Disk drive evaluating burst metric |
US8717695B1 (en) | 2012-02-29 | 2014-05-06 | Western Digital (Fremont), Llc | Characterizing head parameters of a disk drive by evaluating track profile of an overwritten track |
US8625224B1 (en) | 2012-05-04 | 2014-01-07 | Western Digital (Fremont), Llc | Characterizing magnetic recording parameters of a disk drive by evaluating track profile of dual microtracks |
US9387568B1 (en) * | 2013-02-27 | 2016-07-12 | Western Digital Technologies, Inc. | Systems and methods for correcting fabrication error in magnetic recording heads using magnetic write width measurements |
US8908310B1 (en) | 2013-07-11 | 2014-12-09 | Western Digital Technologies, Inc. | Adaptive shingle guard band |
US8736995B1 (en) | 2013-09-05 | 2014-05-27 | Seagate Technology Llc | Identifying track pitch capability of a recording device |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03232103A (ja) * | 1990-02-07 | 1991-10-16 | Fujitsu Ltd | 磁気記録装置のクロストーク除去方法 |
JPH06111502A (ja) * | 1992-09-30 | 1994-04-22 | Sony Corp | 磁気ディスク装置 |
US6061201A (en) * | 1994-02-07 | 2000-05-09 | Seagate Technology, Inc. | Method of measuring the read-to-write offset in a disc drive having separate read and write elements |
US6091559A (en) * | 1994-12-19 | 2000-07-18 | Mobile Storage Technology Inc. | Variable zone layout and track pitch parameter considerations for information storage disk drive |
US6265868B1 (en) * | 1997-12-11 | 2001-07-24 | Seagate Technology Llc | System and method for measuring total track width of a test track in magnetic media |
US6778343B2 (en) * | 1998-03-25 | 2004-08-17 | Hitachi Global Storage Technologies Netherlands Bv | Method, apparatus and storage system having storage media with different track pitch based upon a width of a write element associated therewith |
JP2000182201A (ja) * | 1998-12-16 | 2000-06-30 | Hitachi Ltd | 磁気記録媒体評価装置 |
JP3757071B2 (ja) * | 1999-01-21 | 2006-03-22 | 株式会社日立グローバルストレージテクノロジーズ | 磁気ディスク装置 |
US6469855B1 (en) * | 1999-04-30 | 2002-10-22 | International Business Machines Corporation | Method and system for adaptive settle and write inhibit constraints based on head geometry and servo/mechanical system |
WO2001031644A1 (en) * | 1999-10-28 | 2001-05-03 | Seagate Technology Llc | Method for calibrating mr head geometry in selfservo writing disc drives |
JP2001176003A (ja) * | 1999-12-17 | 2001-06-29 | Hitachi Ltd | 磁気ディスクの磁気的欠陥検査方法 |
US7342741B1 (en) * | 2000-02-10 | 2008-03-11 | Esgw Holdings Limited | Disk drive with variable track density |
US6693763B2 (en) * | 2000-07-26 | 2004-02-17 | Seagate Technology Llc | Method for linearizing microactuator hysteresis for a disc drive |
WO2002027887A1 (en) * | 2000-09-27 | 2002-04-04 | Seagate Technology Llc | Automated drive-level microtrack profile using variable gain amplifier |
US6630824B2 (en) * | 2000-10-10 | 2003-10-07 | Seagate Technology Llc | Method to measure signal decay and a device therefor |
US6963458B2 (en) * | 2002-02-28 | 2005-11-08 | Hitachi Global Storage Technologies, Netherlands B.V. | Method and apparatus for reducing the servo position error signal non-linearity during self-servo writing irrespective of the head width |
US7046471B2 (en) * | 2002-07-31 | 2006-05-16 | Seagate Technology Llc | Method and apparatus for utilizing variable tracks per inch to reduce bits per inch for a head |
US7023633B2 (en) * | 2003-01-31 | 2006-04-04 | Hitachi Global Storage Technologies Netherland B.V. | Adaptive track count determination for a self-servowritten disk drive |
-
2002
- 2002-07-18 KR KR10-2002-0041989A patent/KR100455391B1/ko not_active IP Right Cessation
-
2003
- 2003-07-17 JP JP2003275931A patent/JP3909044B2/ja not_active Expired - Fee Related
- 2003-07-18 US US10/621,354 patent/US6992849B2/en not_active Expired - Fee Related
- 2003-07-18 EP EP03016324A patent/EP1383114B1/en not_active Expired - Fee Related
- 2003-07-18 DE DE60326521T patent/DE60326521D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR100455391B1 (ko) | 2004-11-06 |
EP1383114B1 (en) | 2009-03-11 |
EP1383114A3 (en) | 2005-10-05 |
KR20040008363A (ko) | 2004-01-31 |
US6992849B2 (en) | 2006-01-31 |
JP3909044B2 (ja) | 2007-04-25 |
US20040080845A1 (en) | 2004-04-29 |
DE60326521D1 (de) | 2009-04-23 |
EP1383114A2 (en) | 2004-01-21 |
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