JP2020187815A5 - - Google Patents

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JP2020187815A5
JP2020187815A5 JP2019093786A JP2019093786A JP2020187815A5 JP 2020187815 A5 JP2020187815 A5 JP 2020187815A5 JP 2019093786 A JP2019093786 A JP 2019093786A JP 2019093786 A JP2019093786 A JP 2019093786A JP 2020187815 A5 JP2020187815 A5 JP 2020187815A5
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Japan
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track
recorded signal
quality
head
disk
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JP2019093786A
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English (en)
Japanese (ja)
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JP2020187815A (ja
JP7170583B2 (ja
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Priority to JP2019093786A priority Critical patent/JP7170583B2/ja
Priority claimed from JP2019093786A external-priority patent/JP7170583B2/ja
Priority to CN202010008450.0A priority patent/CN111951835B/zh
Priority to US16/773,032 priority patent/US10825478B1/en
Priority to US17/038,446 priority patent/US11189317B2/en
Publication of JP2020187815A publication Critical patent/JP2020187815A/ja
Publication of JP2020187815A5 publication Critical patent/JP2020187815A5/ja
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JP2019093786A 2019-05-17 2019-05-17 磁気記録装置及びその磁気ヘッド制御方法 Active JP7170583B2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2019093786A JP7170583B2 (ja) 2019-05-17 2019-05-17 磁気記録装置及びその磁気ヘッド制御方法
CN202010008450.0A CN111951835B (zh) 2019-05-17 2020-01-06 磁记录装置及其的磁头控制方法
US16/773,032 US10825478B1 (en) 2019-05-17 2020-01-27 Magnetic recording apparatus and method of controlling magnetic head thereof
US17/038,446 US11189317B2 (en) 2019-05-17 2020-09-30 Magnetic recording apparatus and method of controlling magnetic head thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019093786A JP7170583B2 (ja) 2019-05-17 2019-05-17 磁気記録装置及びその磁気ヘッド制御方法

Publications (3)

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JP2020187815A JP2020187815A (ja) 2020-11-19
JP2020187815A5 true JP2020187815A5 (enExample) 2021-10-07
JP7170583B2 JP7170583B2 (ja) 2022-11-14

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US (2) US10825478B1 (enExample)
JP (1) JP7170583B2 (enExample)
CN (1) CN111951835B (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022045670A (ja) * 2020-09-09 2022-03-22 株式会社東芝 磁気ディスク装置及び記録領域の設定方法
JP2023031619A (ja) 2021-08-25 2023-03-09 株式会社東芝 磁気ディスク装置
JP2023044139A (ja) * 2021-09-17 2023-03-30 株式会社東芝 磁気ディスク装置及び記録型式の変更方法
JP2024135927A (ja) 2023-03-23 2024-10-04 株式会社東芝 磁気記録再生装置及びその制御方法
JP2025044548A (ja) 2023-09-20 2025-04-02 株式会社東芝 磁気記録再生装置、及び磁気記録再生装置の制御方法
US12456487B1 (en) * 2024-06-17 2025-10-28 Kabushiki Kaisha Toshiba Magnetic disk device and method

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030986A1 (en) * 1994-05-10 1995-11-16 Hitachi Maxell, Ltd. Magnetooptical recording medium, and method and apparatus for recording/reproduction
CN1147837C (zh) * 1995-03-13 2004-04-28 日立环球储存科技荷兰有限公司 用于在存储介质上生成定时模式的方法和系统
JP3457463B2 (ja) * 1996-04-26 2003-10-20 富士通株式会社 光学的記憶装置
US6292448B1 (en) * 1998-07-27 2001-09-18 Pioneer Corporation Information recording apparatus
JP2000215537A (ja) * 1999-01-14 2000-08-04 Fujitsu Ltd 光磁気記録媒体の再生方法及び光磁気記録媒体再生装置
KR100363166B1 (ko) * 2000-02-26 2002-11-30 삼성전자 주식회사 오기록 방지 회로 및 방법
US7082088B2 (en) * 2001-03-30 2006-07-25 Tdk Corporation Optical recording medium and optical recording method by irradiation
JP2003030834A (ja) * 2001-07-17 2003-01-31 Ricoh Co Ltd 光ディスク記録装置
US6842304B2 (en) * 2003-01-08 2005-01-11 International Business Machines Corporation Measurement of write track width for magnetic tape head
US7092194B2 (en) * 2003-02-07 2006-08-15 Meyer Dallas W Method of calibrating magnetic storage medium bi-directional recording head
CN1285071C (zh) * 2003-08-27 2006-11-15 威盛电子股份有限公司 模拟真实记录的激光功率校正方法
JP2006012353A (ja) * 2004-06-29 2006-01-12 Hitachi Global Storage Technologies Netherlands Bv ディスク装置及びその製造方法
JP2006092629A (ja) * 2004-09-22 2006-04-06 Sony Corp 記録再生装置、記録方法
CN1925024A (zh) * 2005-09-01 2007-03-07 凌阳科技股份有限公司 光储存媒体的写入参数最佳化的方法以及记录装置
JP2007164958A (ja) * 2005-11-21 2007-06-28 Tdk Corp 記録再生装置およびパラメータ測定方法
JP4826438B2 (ja) * 2006-11-15 2011-11-30 株式会社日立製作所 光ディスク記録装置、および、光ディスク記録方法。
JPWO2008062671A1 (ja) * 2006-11-24 2010-03-04 シャープ株式会社 磁気記録再生装置及び磁気記録条件決定方法
KR100900201B1 (ko) * 2007-07-04 2009-06-02 삼성전자주식회사 자기기록매체, 이를 채용하는 하드디스크 드라이브 및하드디스크 드라이브의 ｗｒ 오프셋 측정방법
JP4794516B2 (ja) * 2007-07-25 2011-10-19 シャープ株式会社 記録装置
CN101471098B (zh) * 2007-12-28 2011-04-13 广明光电股份有限公司 激光功率控制电路偏移补偿方法
JP4836966B2 (ja) * 2008-01-18 2011-12-14 株式会社日立製作所 ヘッドジンバルアセンブリ及び情報記録装置
JP5330757B2 (ja) * 2008-08-06 2013-10-30 エイチジーエスティーネザーランドビーブイ 磁気記録方法及び磁気記録装置
JP2010152992A (ja) * 2008-12-25 2010-07-08 Toshiba Storage Device Corp 記憶装置及びその製造方法
TW201027522A (en) * 2009-01-09 2010-07-16 Sunplus Technology Co Ltd Methods for on-line calibrating output power of optical pick-up
US8477569B2 (en) * 2010-02-23 2013-07-02 Seagate Technology Llc Light source power control for heat assisted magnetic recording (HAMR)
JP5485770B2 (ja) * 2010-03-31 2014-05-07 ダブリュディ・メディア・シンガポール・プライベートリミテッド 磁気ディスク装置
JP2011258269A (ja) * 2010-06-09 2011-12-22 Sony Corp 記録装置、記録方法、プログラム
JP2012038391A (ja) * 2010-08-10 2012-02-23 Hitachi Ltd 磁気ヘッドスライダ及び磁気記録再生装置
JP5717423B2 (ja) * 2010-11-30 2015-05-13 株式会社東芝 磁気記録装置、コントローラ、及び磁気記録方法
US8854752B2 (en) * 2011-05-03 2014-10-07 Lsi Corporation Systems and methods for track width determination
US8797672B2 (en) 2012-06-14 2014-08-05 HGST Netherlands B.V. Dynamic track pitch control for shingled magnetic recording (SMR)
DE102014003205A1 (de) * 2014-03-04 2015-09-10 Inodyn Newmedia Gmbh Verfahren und Vorrichtung für effiziente, verteilte Schreibzugriffe bei Speichervorrichtungen mit überlappenden Datenspuren
CN104881244B (zh) * 2014-05-28 2018-02-09 陈杰 存储系统及其数据保护方法
JP2016035794A (ja) 2014-08-01 2016-03-17 株式会社東芝 磁気ディスク装置、プリアンプ、及び制御方法
US9336831B2 (en) 2014-10-10 2016-05-10 Seagate Technology Llc HAMR drive fault detection system
US9812156B2 (en) * 2015-01-20 2017-11-07 Headway Technologies, Inc. Thermally-assisted magnetic recording head including a main pole and a plasmon generator
US9384774B1 (en) * 2015-03-23 2016-07-05 Western Digital Technologies, Inc. Data storage device calibrating a laser power for heat assisted magnetic recording based on slope of quality metric
US9236081B1 (en) 2015-03-31 2016-01-12 Seagate Technology Llc Laser temperature calibration in a HAMR device
JP2016212930A (ja) * 2015-04-28 2016-12-15 株式会社東芝 記憶装置、コントローラ、及び制御方法
US10090011B2 (en) * 2015-05-19 2018-10-02 Seagate Technology Llc Procedure for setting laser and heater power in HAMR device
US9311951B1 (en) * 2015-09-24 2016-04-12 Seagate Technology Llc Laser adjustment during field operation of a heat-assisted magnetic recording data storage device
JP2017123210A (ja) * 2016-01-08 2017-07-13 株式会社東芝 磁気記録装置、及び読み込み方法
US10056109B2 (en) * 2016-12-22 2018-08-21 Seagate Technology Llc Shingled magnetic recording with operational based track spacing
US9966093B1 (en) * 2016-12-28 2018-05-08 Western Digital Technologies, Inc. Heat assisted magnetic recording head gimbal assembly and hard disk drive using same

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