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1. 发明授权

US09576597B2 Disk drive sensor selection 有权
标题翻译：磁盘驱动器传感器选择
公开(公告)号：US09576597B2
公开(公告)日：2017-02-21
申请号：US14656348
申请日：2015-03-12
申请人： SEAGATE TECHNOLOGY LLC
发明人： Jon Trantham , Puskal Pokharel
IPC分类号： G11B5/265 , G11B5/55
CPC分类号： G11B5/2652 , G11B5/5539 , G11B5/5543
摘要： Implementations described and claimed herein includes a method comprising selecting a zone of one or more tracks on a disk drive having a plurality of magnetic sensors on a transducer head, determining a performance matrix related to the selected track zone, and selecting a first subset and a second subset of the plurality of magnetic sensors based on the determined performance matrix, wherein only the first subset of the plurality of magnetic sensors are used for data recovery in the selected track zone, and the second subset of the plurality of magnetic sensors are used for servo recovery.
摘要翻译：本文描述和要求保护的实施方案包括一种方法，包括在具有在换能器头上的多个磁性传感器的磁盘驱动器上选择一个或多个磁道的区域，确定与所选轨道区域相关的性能矩阵，以及选择第一子集和基于所确定的性能矩阵，所述多个磁传感器的第二子集，其中只有所述多个磁传感器的第一子集用于所选轨道区域中的数据恢复，并且所述多个磁传感器的第二子集用于伺服恢复。

2. 发明授权

US09349400B1 Magnetic recording disk drive with adjustable data track pitch and compensation for repeatable runout (RRO) 有权
标题翻译：磁记录磁盘驱动器，具有可调节数据轨距和补偿可重复跳动（RRO）
公开(公告)号：US09349400B1
公开(公告)日：2016-05-24
申请号：US14749814
申请日：2015-06-25
申请人： HGST Netherlands B.V.
发明人： Abhishek Dhanda , Toshiki Hirano , Tetsuo Semba , Satoshi Yamamoto
IPC分类号： G11B5/596 , G11B5/55
CPC分类号： G11B5/59627 , G11B5/5543 , G11B5/59655
摘要： A hard disk drive with adjustable data track pitch has repeatable runout (RRO) fields stored in he servo sectors for each servo sector of each servo track, and thus without the need to store the RRO fields in the data tracks. The RRO fields for each servo sector have a radial length of at least two servo tracks (i.e., equal to or greater than twice the servo track pitch). The RRO fields in each servo track are shifted radially from RRO fields in adjacent servo tracks and circumferentially spaced from RRO fields in adjacent servo tracks. The read head reads two different RRO fields from the two servo tracks closest to the data track and the servo electronics interpolates a RRO value from these two RRO values. Thus even if the data track pitch is changed, RRO values can be obtained.
摘要翻译：具有可调数据轨道间距的硬盘驱动器对于每个伺服磁道的每个伺服扇区存储在伺服扇区中的可重复跳动（RRO）字段，因此不需要将RRO字段存储在数据轨道中。每个伺服扇区的RRO字段具有至少两个伺服磁道的径向长度（即等于或大于伺服磁道间距的两倍）。每个伺服轨道中的RRO场从相邻伺服轨道中的RRO场径向偏移，并且在相邻伺服轨道中与RRO场周向间隔开。读取头从最靠近数据轨道的两个伺服磁道读取两个不同的RRO场，并且伺服电子装置从这两个RRO值插入RRO值。因此，即使数据轨道间距改变，也可以获得RRO值。

3. 发明授权

US06243330B1 Medium, apparatus, and method related to encryption resultant information 有权
标题翻译：与加密结果信息相关的记录介质，装置和方法
公开(公告)号：US06243330B1
公开(公告)日：2001-06-05
申请号：US09305318
申请日：1999-05-05
申请人： Mitsuaki Oshima
发明人： Mitsuaki Oshima
IPC分类号： G11B1722
CPC分类号： G11B27/329 , G06F3/0601 , G06F3/061 , G06F3/0632 , G06F3/0634 , G06F3/0653 , G06F3/0674 , G06F3/0677 , G06F21/00 , G06F21/80 , G06F2003/0697 , G11B5/00 , G11B5/012 , G11B5/1278 , G11B5/17 , G11B5/2654 , G11B5/5526 , G11B5/5543 , G11B5/59677 , G11B7/0037 , G11B7/005 , G11B7/00736 , G11B7/00745 , G11B7/24 , G11B7/26 , G11B7/28 , G11B11/10502 , G11B11/10532 , G11B11/10556 , G11B11/10558 , G11B11/10595 , G11B13/00 , G11B13/04 , G11B13/045 , G11B17/04 , G11B17/041 , G11B17/043 , G11B17/056 , G11B19/02 , G11B19/04 , G11B19/10 , G11B19/12 , G11B19/122 , G11B19/24 , G11B19/247 , G11B20/00007 , G11B20/00086 , G11B20/00094 , G11B20/00166 , G11B20/00188 , G11B20/00224 , G11B20/00253 , G11B20/00268 , G11B20/00318 , G11B20/00347 , G11B20/00557 , G11B20/00586 , G11B20/00594 , G11B20/00601 , G11B20/0071 , G11B20/00876 , G11B20/1217 , G11B20/1833 , G11B20/1866 , G11B20/24 , G11B23/0302 , G11B23/0306 , G11B23/0308 , G11B23/28 , G11B23/281 , G11B23/284 , G11B23/40 , G11B23/44 , G11B25/04 , G11B27/034 , G11B27/105 , G11B27/107 , G11B27/11 , G11B27/24 , G11B27/3027 , G11B27/3063 , G11B27/34 , G11B27/36 , G11B31/00 , G11B2007/0013 , G11B2020/1259 , G11B2220/20 , G11B2220/211 , G11B2220/213 , G11B2220/237 , G11B2220/2525 , G11B2220/2529 , G11B2220/2545 , G11B2220/2587 , G11B2220/65 , G11B2220/655 , G11B2220/90
摘要： A disk-shaped recording medium includes a transparent substrate, and an optical recording layer formed on the transparent substrate. A light source emits light. An optical head is operative for applying the light to the optical recording layer from the light source via the transparent substrate, for focusing the light on the optical recording layer, and for reproducing information from the optical recording layer. A position detecting device is operative for detecting at least one of a pit depth and a physical position of information which has a first given relation with a specified address and which is recorded on the recording medium, and for generating first positional information representing at least one of the pit depth and the physical position. A previously-recorded secret code is reproduced from the recording medium. The secret code represents second positional information. The secret code is decoded into the second positional information. The second positional information represents at least one of a predetermined reference pit depth and a predetermined reference physical position. The first positional information and the second positional information are collated, and a check is made as to whether or not the first positional information and the second positional information are in a second given relation. When the first positional information and the second positional information are not in the second given relation, one of outputting of a reproduced signal of the recording medium, operation of a program stored in the recording medium, and decoding of the secret code is stopped.
摘要翻译：盘形记录介质包括透明基板和形成在透明基板上的光记录层。光源发光。光头用于通过透明基板将光从光源施加到光学记录层，用于将光聚焦在光学记录层上，并用于从光学记录层再现信息。位置检测装置用于检测与指定地址具有第一给定关系并且被记录在记录介质上的信息的凹坑深度和物理位置中的至少一个，并且用于生成表示至少一个的第一位置信息的坑深和物理位置。从记录介质再现先前记录的密码。密码表示第二位置信息。秘密码被解码成第二位置信息。第二位置信息表示预定参考凹坑深度和预定参考物理位置中的至少一个。整理第一位置信息和第二位置信息，并且检查第一位置信息和第二位置信息是否处于第二给定关系。当第一位置信息和第二位置信息不是第二给定关系时，停止记录介质的再现信号的输出之一，存储在记录介质中的程序的操作和密码的解码。

4. 发明授权

US6043951A Method, apparatus, and magnetic disk for optimizing off-track position of a magnetoresistive head 失效
标题翻译：用于优化磁阻头的偏离轨迹位置的方法，装置和磁盘
公开(公告)号：US6043951A
公开(公告)日：2000-03-28
申请号：US922308
申请日：1997-09-02
申请人： Hae-Joung Lee
发明人： Hae-Joung Lee
IPC分类号： G11B5/00 , G11B5/012 , G11B5/55 , G11B5/596
CPC分类号： G11B5/012 , G11B5/5534 , G11B5/5543 , G11B5/59683 , G11B2005/0016
摘要： An off-track optimizing apparatus, disk, and method for raising track density of a hard disk drive using a magnetoresistive head. An optimal off-track amount is detected in an initial test process of a hard disk drive, and an additional position detection signal is written into a specific area of a disk. During track follow, the magnetoresistive head is on-tracked in a specific track by using the additional position detection signal.
摘要翻译：一种用于使用磁阻头提高硬盘驱动器的轨道密度的偏离轨道优化装置，盘和方法。在硬盘驱动器的初始测试过程中检测到最佳偏离量，并且附加位置检测信号被写入盘的特定区域。在跟踪期间，通过使用附加位置检测信号，磁阻头在特定轨迹中被跟踪。

5. 发明授权

US5796541A Servo track writing measurement of gapped initial clock track to write full clock track 失效
标题翻译：伺服轨迹写入测量的间隙初始时钟轨道写入全时钟轨道
公开(公告)号：US5796541A
公开(公告)日：1998-08-18
申请号：US561468
申请日：1995-11-21
申请人： Anatoly Stein , Alexander Tesler , Dimitry Varsanofiev
发明人： Anatoly Stein , Alexander Tesler , Dimitry Varsanofiev
IPC分类号： G11B5/55 , G11B20/14 , G11B5/012
CPC分类号： G11B5/5543 , G11B20/1403
摘要： An apparatus for servo track writing on a magnetic medium comprises a clock head (12) and a regular head (14). The regular head (14) writes an initial approximation of the clock track so as to leave a small gap between the last written pulse of the clock track and the first pulse of the clock track. Then this gap is measured by gap measurement system (33) and the frequency of clock track is updated using a direct digital synthesis system (35) so as to fill a full clock track during the next writing. The initial clock track is read by regular head (14) and its output signal is supplied to a phase locked loop. The output of the phase locked loop drives a direct digital synthesis system (35), which generates a modified frequency on its output. A signal of this frequency, in turn, is supplied to the clock head (12), which writes a new improved clock track on the disk. The resulting clock track closure is determined by instability of disk rotational speed at the gap interval and can be made less than 1 ns after five disk revolutions.
摘要翻译：用于在磁介质上进行伺服磁道写入的装置包括时钟磁头（12）和普通磁头（14）。正常头（14）写入时钟轨迹的初始近似，以便在时钟轨道的最后写入脉冲和时钟轨道的第一脉冲之间留下小间隙。然后，通过间隙测量系统（33）测量该间隙，并且使用直接数字合成系统（35）更新时钟轨道的频率，以便在下一次写入期间填充完整的时钟轨道。初始时钟轨道由普通头（14）读取，其输出信号被提供给锁相环。锁相环的输出驱动直接数字合成系统（35），其在其输出上产生修改的频率。该频率的信号又被提供给时钟磁头（12），该时钟磁头在磁盘上写入一个新的改进的时钟轨道。所产生的时钟轨道闭合由间隙间隔时的盘旋转速度的不稳定性决定，并且可以在五盘旋转之后小于1ns。

6. 发明授权

US4562494A Disk drive alignment analyzer 失效
标题翻译：磁盘驱动器对准分析仪
公开(公告)号：US4562494A
公开(公告)日：1985-12-31
申请号：US482906
申请日：1983-04-07
申请人： Charles R. Bond
发明人： Charles R. Bond
IPC分类号： G11B5/56 , G11B5/55 , G11B21/10 , G11B27/36
CPC分类号： G11B27/36 , G11B5/5543
摘要： An alignment testing device comprising a magnetic media with data tracks in nonstandard locations with bidirectionally progressive degrees of misalignment for testing the alignment of the transducer head in a magnetic storage device such as a floppy disk drive. The alignment testing device allows the user to determine the boundaries of track alignments that the transducer head can read, and thereby determine any discrepancy between the heads actual alignment and correct alignment.
摘要翻译：一种对准测试装置，包括磁性介质，其具有非标准位置的数据轨道，具有双向渐进的不对准度，用于测试诸如软盘驱动器的磁存储装置中的换能器头的对准。对准测试装置允许用户确定换能器头可以读取的轨道对准的边界，从而确定头部实际对准和正确对准之间的任何差异。

7. 发明授权

US09905256B1 Magnetic disc apparatus 有权
公开(公告)号：US09905256B1
公开(公告)日：2018-02-27
申请号：US15654790
申请日：2017-07-20
申请人： Kabushiki Kaisha Toshiba
发明人： Makoto Asakura
IPC分类号： G11B5/596 , G11B5/55 , G11B20/12
CPC分类号： G11B5/5547 , G11B5/5543 , G11B5/59638 , G11B5/59655 , G11B5/59688 , G11B20/1217 , G11B20/1258 , G11B2020/1282
摘要： According to one embodiment, servo patterns different in servo pattern frequency are recorded in zones divided in a radial direction on a magnetic disc, and the servo patterns in the adjacent zones overlap each other in a predetermined area from a zone servo boundary between the zones, and a determination boundary where it is determined to execute a crossing process is set within the overlapping area of the servo patterns upstream from the zone servo boundary, based on position information on a seek destination and the present position of the magnetic head.

8. 发明申请

US20160293192A1 SPIRAL WRITE LAUNCH WHILE SERVOING ON REFERENCE GUIDE SPIRALS 有权
标题翻译：在参考指南螺旋上进行螺旋写入启动
公开(公告)号：US20160293192A1
公开(公告)日：2016-10-06
申请号：US14675482
申请日：2015-03-31
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Jiangang LIANG , Gabor SZITA , Tony HUANG , Gary W. CALFEE
IPC分类号： G11B5/596 , G11B20/12
CPC分类号： G11B5/59661 , G11B5/5543 , G11B5/59666 , G11B20/1217 , G11B2020/1238 , G11B2020/1281
摘要： A reference spiral is written on a recording surface of a hard disk drive. By launching writing of fine guide spirals from a launch point that is disposed on a pre-existing coarse guide spiral, writing of the fine guide spiral can be launched in response to a write head crossing the pre-existing coarse guide spiral, rather than in response to a precisely timed event. To enable launch points being disposed on pre-existing coarse guide spirals, launch points are not all located at the same radial position on the recording surface.
摘要翻译：参考螺旋写在硬盘驱动器的记录表面上。通过从位于预先存在的粗导向螺旋上的发射点发出精细导向螺旋的写入，可以响应于写头横过预先存在的粗导丝螺旋而不是在对精确定时事件的回应。为了使发射点处于预先存在的粗导螺旋上，发射点并不都位于记录表面上相同的径向位置。

9. 发明授权

US08995075B1 Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary 有权
标题翻译：磁盘驱动器调整估计伺服状态，以补偿穿过伺服区域边界时的瞬态
公开(公告)号：US08995075B1
公开(公告)日：2015-03-31
申请号：US13529958
申请日：2012-06-21
申请人： Michael Chang , Guoxiao Guo , Jie Yu
发明人： Michael Chang , Guoxiao Guo , Jie Yu
IPC分类号： G11B5/012 , G11B5/09 , G11B5/55
CPC分类号： G11B20/10222 , G11B5/012 , G11B5/5534 , G11B5/5543 , G11B5/556 , G11B5/5586 , G11B5/596 , G11B5/59622 , G11B5/59655 , G11B5/59688 , G11B20/10046 , G11B20/1217 , G11B2020/1232 , G11B2020/1242 , G11B2020/1281
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones, where a servo data rate of servo sectors in a first servo zone is different than a servo data rate of servo sectors in a second servo zone. A servo control system servos a head over the disk. An estimated servo state of a servo control system is generated, and when the head crosses from a first servo zone to a second servo zone, the estimated servo state is adjusted to compensate for a transient in a circumferential distance between a servo sector in the first servo zone and a servo sector in the second servo zone.
摘要翻译：公开了一种磁盘驱动器，其包括盘，该盘包括限定多个伺服轨道的多个伺服扇区。伺服轨道形成多个伺服区，其中第一伺服区中的伺服扇区的伺服数据速率与第二伺服区中的伺服扇区的伺服数据速率不同。伺服控制系统通过磁盘驱动头。产生伺服控制系统的估计伺服状态，并且当磁头从第一伺服区与第二伺服区交叉时，调整估计的伺服状态以补偿第一伺服区中的伺服扇区之间的圆周距离内的瞬态伺服区和第二伺服区中的伺服扇区。

10. 发明授权

US08767340B1 Spiral band end detection 有权
标题翻译：螺旋带末端检测
公开(公告)号：US08767340B1
公开(公告)日：2014-07-01
申请号：US13494487
申请日：2012-06-12
申请人： Perry Neos , Luan Ton-That , Man Cheung
发明人： Perry Neos , Luan Ton-That , Man Cheung
IPC分类号： G11B21/02 , G11B5/596 , G11B15/12
CPC分类号： G11B5/59661 , G11B5/5526 , G11B5/5534 , G11B5/5543 , G11B5/596 , G11B5/59638
摘要： Methods, systems and computer program products for detecting an end of a reference spiral band are described. A first portion of servo information may be written on a disk using the reference spiral band. By detecting an end of a reference spiral band, a new reference spiral band may be launched. A read/write head of a hard disk drive may subsequently use the new spiral band to write the remaining portion of the servo information, which aids the writing of data tracks on the disk.
摘要翻译：描述了用于检测参考螺旋带的末端的方法，系统和计算机程序产品。伺服信息的第一部分可以使用参考螺旋带写在盘上。通过检测参考螺旋带的结束，可以启动新的参考螺旋带。硬盘驱动器的读/写头可以随后使用新的螺旋带来写入伺服信息的剩余部分，这有助于将数据轨迹写入盘上。

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