公开(公告)号：EP0915456B1

公开(公告)日：2010-09-08

申请号：EP97930855.8

申请日：1997-07-18

申请人： Panasonic Corporation

发明人： ISHIDA, Tatsuaki, 3-1421, Nakamozukouendanchi ,  SUGITA, Ryuji ,  TOHMA, Kiyokazu ,  YOSHIMOTO, Kazunari, B-103, Iwakuramuramatsu ,  MIYATA, Keizou, Room 409 ,  RYONAI, Hiroshi

IPC分类号： G11B5/86 ,  G11B5/82 ,  G11B5/84 ,  G11B5/64 ,  G11B5/855 ,  G11B5/596

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

公开(公告)号：EP1580732B1

公开(公告)日：2008-03-12

申请号：EP05006374.2

申请日：2005-03-23

申请人： FUJIFILM Corporation

发明人： Yasunaga, Tadashi

IPC分类号： G11B5/596 ,  G11B5/86 ,  G11B5/82

CPC分类号： G11B5/59655 ,  G11B5/59633 ,  G11B5/74 ,  G11B5/82 ,  G11B5/865

公开(公告)号：EP1271476A3

公开(公告)日：2004-03-24

申请号：EP01308470.2

申请日：2001-10-03

申请人： FUJITSU LIMITED

发明人： Hirano, Masakazu, c/o Fujitsu Limited ,  Suzuki, Nobuyuki, c/o Fujitsu Limited

IPC分类号： G11B5/596

CPC分类号： G11B5/59655

摘要： A magnetic disk unit writes, on a magnetic disk, a burst position error data which is used for correcting a positional error of a burst pattern which is used for correcting an error within one track, next to the burst pattern. A write head is controlled a position so as to satisfy a relationship M = N when (N-1)K

公开(公告)号：EP0930609B1

公开(公告)日：2003-03-19

申请号：EP99106246.4

申请日：1995-06-02

申请人： FUJITSU LIMITED

发明人： Saiki, Masaru ,  Sasaki, Tsutomu ,  Ishizaki, Hirokazu ,  Okamura, Eiji ,  Gofuku, Tatsuya ,  Suzuki, Norihiko, c/o Yamagata Fujitsu Ltd. ,  Tohkairin, Koichi, c/o Yamagata Fujitsu Ltd. ,  Suzuki, Hirofumi, c/o Yamagata Fujitsu Ltd. ,  Endo, Kenji, c/o Yamagata Fujitsu Ltd. ,  Ono, Chihiro, c/o Yamagata Fujitsu Ltd. ,  Ohba, Kazuhide, c/o Yamagata Fujitsu Ltd. ,  Satoh, Atsushi, c/o Yamagata Fujitsu Ltd. ,  Takahashi, Eisaku, c/o Yamagata Fujitsu Ltd. ,  Tokairin, Takashi, c/o Yamagata Fujitsu Ltd. ,  Suda, Isao, c/o Yamagata Fujitsu Ltd. ,  Ono, Takahiro, c/o Yamagata Fujitsu Ltd.

IPC分类号： G11B5/55 ,  G11B5/596

CPC分类号： G11B25/043 ,  G11B5/012 ,  G11B5/40 ,  G11B5/486 ,  G11B5/5521 ,  G11B5/5534 ,  G11B5/596 ,  G11B5/59655 ,  G11B21/083 ,  G11B33/00 ,  G11B2005/0018

公开(公告)号：EP1026684A4

公开(公告)日：2003-01-02

申请号：EP99931555

申请日：1999-07-27

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： OKI KENJI

IPC分类号： G11B5/596 ,  G11B21/10

CPC分类号： G11B5/59655

摘要： In a method of writing tracking servo signal patterns for a magnetic disk device, a servo track writer for writing tracking servo signals records only a first burst signal (8) and a second burst signal (9). After that, the magnetic head of the magnetic disk device reproduces the first burst signal (8) and the second burst signal (9). The magnetic head of the magnetic disk device then records a third burst signal (10) and a fourth burst signal (11) while the magnetic head position is so controlled that the ratio between the levels of the reproduced signals may become a predetermined value.

摘要翻译： 写入用于磁盘装置的跟踪伺服信号模式的方法包括仅用第一突发信号8和第二突发信号9记录用于写入跟踪伺服信号的伺服轨迹写入器的步骤，之后通过再现第一突发信号 8和第二突发信号9，其中磁头装在磁盘装置中，并且用磁盘装置的磁头记录第三突发信号10和第四突发信号11，同时控制磁头的位置 这两种再现信号的电平之比变得等于预定比例。

公开(公告)号：EP0809247B1

公开(公告)日：2002-11-27

申请号：EP97302647.9

申请日：1997-04-17

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Park, Jung-Il ,  Park, Yong-Woo

IPC分类号： G11B20/12

CPC分类号： G11B20/1258 ,  G11B5/59655 ,  G11B20/10 ,  G11B2020/1234 ,  G11B2020/1281

公开(公告)号：EP1189222A2

公开(公告)日：2002-03-20

申请号：EP01122138.9

申请日：2001-09-14

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Chu, Sang-Hoon ,  Shim, Jun-Seok ,  Yu, Seong-Hwan ,  Choi, Soo-Il

IPC分类号： G11B19/04 ,  G11B5/596

CPC分类号： G11B20/1883 ,  G11B5/59655 ,  G11B20/18 ,  G11B27/3027 ,  G11B27/36 ,  G11B2020/183 ,  G11B2220/20

摘要： An apparatus, method and computer program product for a hard disk drive (10) defect detection system. In one embodiment, a method of detecting defects on the surface of a disk (12) having a plurality of tracks (t n ) is recited. The method comprises reading, one or more times, the servo bits for a plurality of sectors (i) and determining a burst measure for at least one sector, where the burst measure is a function of the burst signals for the sector. This method further comprises determining a reference value, where the reference value is a function of the burst signals of the plurality of sectors, and comparing the burst measure of at least one sector to the reference value to identify a potential defect. In one embodiment, a sector is mapped as defective where its burst measure differs from the reference value by at least 5 percent.

公开(公告)号：EP0898813A4

公开(公告)日：2001-04-18

申请号：EP97952555

申请日：1997-12-18

申请人： QUANTUM CORP

发明人： PATAPOUTIAN ARA ,  FISHER KEVIN D ,  BUCH BRUCE D

IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/12 ,  G11B21/08 ,  G11B21/10 ,  H03M1/20 ,  H03M1/48

CPC分类号： G11B5/59605 ,  G11B5/5547 ,  G11B5/59655 ,  G11B20/10009 ,  G11B20/1258 ,  G11B21/085 ,  G11B21/106 ,  H03M1/201

摘要： An analog to digital converter circuit (20) in a sampling data detection channel of a disk drive synchronously samples user data in a data track areas at a first quantization resolution and samples servo bursts from the spoke areas at a second quantization resolution effectively greater than said first quantization resolution. An offset circuit (60) provides a predetermined analog offset signal to a combining circuit (160, 170) which combines it with an incoming analog signal to provide a composite signal during a servo burst sampling interval. An analog to digital converter (180, 190) samples the composite signal during the servo spoke burst sampling interval, and synchronously samples the analog signal during a user data sampling interval. A digital averaging circuit (210) averages the servo spoke samples over a predetermined averaging interval to provide averaged burst samples having increased bit resolution.

摘要翻译： 磁盘驱动器的采样数据检测通道中的模拟 - 数字转换器电路以第一量化分辨率同步采样数据轨道区域中的用户数据，并且以比第一量化分辨率有效地大的第二量化分辨率从轮辐区域采样伺服脉冲串 量化分辨率。 偏移电路向组合电路提供预定的模拟偏移信号，该组合电路将其与输入模拟信号组合，以在辐射伺服脉冲串采样间隔期间提供复合信号。 模数转换器在伺服轮询突发采样间隔期间对复合信号进行采样，并在用户数据采样间隔期间同步采样模拟信号。 数字平均电路在预定的平均间隔上对伺服轮辐样本进行平均，以提供具有增加的比特分辨率的平均突发样本。

公开(公告)号：EP1073043A1

公开(公告)日：2001-01-31

申请号：EP00904053.6

申请日：2000-02-21

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： UMEDA, Yoshio ,  SHIMIZU, Ryosuke ,  YOSHIDA, Syuichi ,  ISHIDA, Tatsuaki ,  TOHMA, Kiyokazu ,  MIYATA, Keizo

IPC分类号： G11B5/86 ,  G11B21/10

CPC分类号： G11B5/865 ,  G11B5/012 ,  G11B5/5521 ,  G11B5/59655 ,  G11B5/82 ,  G11B21/083 ,  G11B21/10 ,  G11B21/106

摘要： A magnetic disk apparatus has: a head 2 that performs data recording and playback while moving relative to a magnetic disk 26 rotating at the prescribed speed;an actuator 3 that positions said head relative to said magnetic disk 26; and a controller 4 that detects the position of said head by means of servo sector that have positioning information recorded magnetically on said magnetic disk 1 and performs control to position said actuator 3 by means of this detection signal, wherein said magnetic disk 1 has at least a part in which the arrangement of tracks having at least said servo sectors is spiral.

摘要翻译： 磁盘装置具有：头部2，其在相对于以规定速度旋转的磁盘26移动的同时执行数据记录和重放;致动器3，其将所述磁头相对于所述磁盘26定位; 以及控制器4，其通过伺服扇区检测具有磁性记录在磁盘1上的定位信息的所述磁头的位置，并通过该检测信号执行控制以定位所述致动器3，其中所述磁盘1至少具有 其中具有至少所述伺服扇区的轨道的排列是螺旋的部分。

公开(公告)号：EP0585979B1

公开(公告)日：1999-10-06

申请号：EP93118458.4

申请日：1992-06-02

申请人： QUANTUM CORPORATION

发明人： Peterson, Bruce R. ,  Machado, Michael G. ,  Barnard, Daniel E. ,  Gold, Clifford M. ,  Do, James H.

IPC分类号： G11B20/12 ,  G11B20/10 ,  G06F3/06 ,  G11B5/596

CPC分类号： G11B19/02 ,  G05B19/0421 ,  G05B2219/21017 ,  G05B2219/2207 ,  G05B2219/25269 ,  G11B5/59655 ,  G11B20/10 ,  G11B20/12 ,  G11B20/1258 ,  G11B2020/1282 ,  G11B2220/20 ,  G11B2220/2508

摘要： A programmable data sequencer is provided for controlling transfer of fixed length data blocks between variable length storage locations of a storage medium and a buffer memory within a data storage device. The data sequencer includes a writeable control store including a random access memory directly addressable by a programmed digital microcontroller of the data storage device for writing sequences of control patterns, there being dual function control patterns such that a single sequence of control patterns may be written for controlling states of the programmable data sequencer during both data read operations and data write operations to and from the storage medium and the buffer memory, a control pattern decoder for decoding the control patterns into functional values for controlling operations within the data sequencer , and a stack memory for holding user byte count values indicating respective lengths of said variable length storage locations so that the storage capacity of each said storage location is determined by the data sequencer automatically as a user byte count value associated with a particular variable length storage location is provided at the stack memory.