公开(公告)号：US09799360B2

公开(公告)日：2017-10-24

申请号：US15267892

申请日：2016-09-16

申请人： Kabushiki Kaisha Toshiba

发明人： Naoki Tagami

IPC分类号： G11B5/596 ,  G11B20/12

CPC分类号： G11B5/59627 ,  G11B20/1217 ,  G11B2020/1281 ,  G11B2020/1282

摘要： According to one embodiment, a magnetic disk drive in the present embodiment includes a disk including tracks, each including servo sectors, a head, and a controller configured to acquire first correction data for repeatable runout occurring in a first direction, and second correction data different from the first correction data, to write the first correction data within a first permitted range in the first direction, to write the second correction data within a write permitted range including the first permitted range and a second permitted range in a second direction opposite to the first direction, to read at least one of the first correction data and the second correction data, and to correctly place the head.

公开(公告)号：US08749904B1

公开(公告)日：2014-06-10

申请号：US13406778

申请日：2012-02-28

申请人： Jiangang Liang ,  Jeng-Yu Wang ,  Siri S. Weerasooriya ,  Duc H. Banh

发明人： Jiangang Liang ,  Jeng-Yu Wang ,  Siri S. Weerasooriya ,  Duc H. Banh

IPC分类号： G11B27/36

CPC分类号： G11B20/10194 ,  G11B5/59627 ,  G11B5/59638 ,  G11B5/59661 ,  G11B20/1217 ,  G11B2020/1282

摘要： A servo writer is disclosed operable to write servo sectors on a disk to define non-circular servo tracks. The servo writer comprises control circuitry including a servo control system operable to measure a position of a head over the disk to generate a position signal, generate a position error signal (PES) representing a difference between the position signal and a reference signal, process the PES with a servo compensator to generate a control signal, and position the head over the disk in response to the control signal. A disturbance is induced into the servo control system, and while positioning the head over the disk in response to the control signal, a plurality of servo sectors are written on the disk to define a servo track, wherein the disturbance induced into the servo control system causes the servo track to be non-circular relative to a rotation axis of the disk.

摘要翻译： 公开了一种伺服写入器，其可操作以在盘上写入伺服扇区以限定非圆形伺服轨道。 伺服写入器包括控制电路，其包括伺服控制系统，该伺服控制系统可操作以测量磁头在磁盘上的位置以产生位置信号，生成表示位置信号与参考信号之间的差异的位置误差信号（PES），处理 PES与伺服补偿器产生控制信号，并且响应于控制信号将磁头定位在磁盘上。 扰动被引入到伺服控制系统中，并且响应于控制信号将磁头定位在磁盘上，多个伺服扇区被写在磁盘上以定义伺服磁道，其中引入到伺服控制系统 使得伺服轨道相对于盘的旋转轴线是非圆形的。

公开(公告)号：US08379340B2

公开(公告)日：2013-02-19

申请号：US12882917

申请日：2010-09-15

申请人： Hakan Ozdemir

发明人： Hakan Ozdemir

IPC分类号： G11B5/09

CPC分类号： H03M7/16 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/10175 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/1403 ,  G11B20/18 ,  G11B2020/1282 ,  G11B2020/1284 ,  G11B2020/1484 ,  G11B2020/1859 ,  G11B2020/1863 ,  H03M13/41 ,  H03M13/6343

摘要： A detector recovers servo data from a servo signal generated by a read-write head, and determines the head-connection polarity from the recovered servo data. Such a detector allows a servo circuit to compensate for a reversed-connected read-write head, and thus allows a manufacturer to forego time-consuming and costly testing to determine whether the head is correctly connected to the servo circuit.

公开(公告)号：US20130003214A1

公开(公告)日：2013-01-03

申请号：US13173088

申请日：2011-06-30

申请人： Jeffrey P. Grundvig ,  Jason D. Byrne ,  Jefferson Singleton

发明人： Jeffrey P. Grundvig ,  Jason D. Byrne ,  Jefferson Singleton

IPC分类号： G11B5/09

CPC分类号： G11B20/10435 ,  G11B5/59616 ,  G11B5/59627 ,  G11B19/045 ,  G11B2020/1282 ,  G11B2020/1287 ,  G11B2220/2516

摘要： Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is discussed that includes: a servo address mark count circuit, a user sync mark count circuit, and an offset calculation circuit. The servo address mark count circuit is operable to provide: a first count corresponding to a first servo address mark within a first track of a storage medium, a second count corresponding to a second servo address mark within the first track, a third count corresponding to a third servo address mark within a second track of the storage medium, and a fourth count corresponding to a fourth servo address mark within the second track. The user sync mark count circuit is operable to provide: a fifth count corresponding to a first user sync mark within the first track, and to provide a sixth count corresponding to a second user sync mark within the second track. The offset calculation circuit is operable to calculate an offset between the first track and the second track based at least in part on the first count, the second count, the third count, the fourth count, the fifth count, and the sixth count.

摘要翻译： 本发明的各种实施例提供了用于数据处理的系统和方法。 作为示例，讨论了包括：伺服地址标记计数电路，用户同步标记计数电路和偏移计算电路的数据处理电路。 伺服地址标记计数电路可操作地提供：与存储介质的第一轨道内的第一伺服地址标记相对应的第一计数，对应于第一轨道内的第二伺服地址标记的第二计数，对应于 在存储介质的第二磁道内的第三伺服地址标记，以及对应于第二磁道内的第四伺服地址标记的第四计数。 用户同步标记计数电路可操作以提供：对应于第一轨道内的第一用户同步标记的第五计数，并且提供对应于第二轨道内的第二用户同步标记的第六计数。 偏移计算电路至少部分地基于第一计数，第二计数，第三计数，第四计数，第五计数和第六计数来计算第一轨道和第二轨道之间的偏移。

公开(公告)号：US20120198304A1

公开(公告)日：2012-08-02

申请号：US13338496

申请日：2011-12-28

申请人： Yosuke KONDO ,  Kenji Yoshida

发明人： Yosuke KONDO ,  Kenji Yoshida

IPC分类号： H03M13/03 ,  G06F11/10

CPC分类号： H03M13/6343 ,  G11B20/1403 ,  G11B20/1833 ,  G11B2020/1282 ,  G11B2020/185 ,  G11B2220/2516 ,  H03M13/1102 ,  H03M13/333 ,  H03M13/4138

摘要： According to one embodiment, an information reproduction apparatus includes a calculator, selector, and decoder. The calculator calculates parity-check passing ratios based on a check matrix of an LDPC code for code word candidates included in a reproduced signal. The selector selects one of the code word candidates based on the parity-check passing ratios calculated by the calculator. The decoder decodes the code word candidate selected by the selector by an iterative decoding process.

摘要翻译： 根据一个实施例，信息再现设备包括计算器，选择器和解码器。 计算器基于包含在再现信号中的码字候选的LDPC码的校验矩阵来计算奇偶校验通过率。 选择器基于由计算器计算的奇偶校验通过率来选择一个代码字候选。 解码器通过迭代解码处理解码由选择器选择的码字候选。

公开(公告)号：US08098448B2

公开(公告)日：2012-01-17

申请号：US12639926

申请日：2009-12-16

申请人： Yoshihiko Maeda ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

发明人： Yoshihiko Maeda ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

IPC分类号： G11B5/09

CPC分类号： G11B20/1258 ,  G11B2020/1242 ,  G11B2020/1282 ,  G11B2020/1292 ,  G11B2220/2516

摘要： A method for dividing a data area on a disk into a plurality of concentric zones and determining a format for each zone so that data tracks in the zone have the same number of data sectors. The method includes dividing a data area into a plurality of zones with provisional boundaries. The method also includes determining a linear recording density for a selected zone. The method further includes selecting the number of data sectors per data track corresponding to the determined linear recording density from specified values. Moreover, the method includes resetting a boundary of the zone at a new boundary shifted from the provisional boundary according to a selected value.

摘要翻译： 一种用于将盘上的数据区划分成多个同心区并且确定每个区的格式的方法，使得区中的数据轨迹具有相同数量的数据扇区。 该方法包括将数据区域划分成具有临时边界的多个区域。 该方法还包括确定所选区域的线性记录密度。 该方法还包括从指定值中选择对应于所确定的线性记录密度的每个数据轨道的数据扇区数。 此外，该方法包括根据所选择的值从临时边界移位的新边界复位区域的边界。

公开(公告)号：US20110085259A1

公开(公告)日：2011-04-14

申请号：US12639926

申请日：2009-12-16

申请人： Yoshihiko MAEDA ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

发明人： Yoshihiko MAEDA ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

IPC分类号： G11B5/09

CPC分类号： G11B20/1258 ,  G11B2020/1242 ,  G11B2020/1282 ,  G11B2020/1292 ,  G11B2220/2516

摘要： A method for dividing a data area on a disk into a plurality of concentric zones and determining a format for each zone so that data tracks in the zone have the same number of data sectors. The method includes dividing a data area into a plurality of zones with provisional boundaries. The method also includes determining a linear recording density for a selected zone. The method further includes selecting the number of data sectors per data track corresponding to the determined linear recording density from specified values. Moreover, the method includes resetting a boundary of the zone at a new boundary shifted from the provisional boundary according to a selected value.

摘要翻译： 一种用于将盘上的数据区划分成多个同心区并且确定每个区的格式的方法，使得区中的数据轨迹具有相同数量的数据扇区。 该方法包括将数据区域划分成具有临时边界的多个区域。 该方法还包括确定所选区域的线性记录密度。 该方法还包括从指定值中选择对应于所确定的线性记录密度的每个数据轨道的数据扇区数。 此外，该方法包括根据所选择的值从临时边界移位的新边界复位区域的边界。

公开(公告)号：US07391584B1

公开(公告)日：2008-06-24

申请号：US11593929

申请日：2006-11-07

申请人： Edgar D. Sheh ,  Yilin Cai

发明人： Edgar D. Sheh ,  Yilin Cai

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/59627 ,  G11B5/59644 ,  G11B5/59661 ,  G11B20/10037 ,  G11B20/10222 ,  G11B20/1403 ,  G11B2020/1282 ,  G11B2020/1287

摘要： A method of servo writing a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted periodically by a sync mark. A timing recovery measurement is generated in response to the sync marks, wherein the timing recovery measurement comprises a sinusoidal component. A timing compensation value is generated in response to the sync marks which estimates the sinusoidal component in the timing recovery measurement. A frequency control signal is generated in response to the timing recovery measurement and the timing compensation value, a servo write clock is generated in response to the frequency control signal, and the servo write clock and the head internal to the disk drive are used to write the product servo sectors to the disk.

摘要翻译： 公开了一种伺服写磁盘驱动器盘的方法。 盘包括多个螺旋轨道，其中每个螺旋轨道包括由同步标记周期性地中断的高频信号。 响应于同步标记产生定时恢复测量，其中定时恢复测量包括正弦分量。 响应于在定时恢复测量中估计正弦分量的同步标记产生定时补偿值。 响应于定时恢复测量和定时补偿值产生频率控制信号，响应于频率控制信号产生伺服写入时钟，并且使用伺服写入时钟和磁盘驱动器内部的磁头写入 产品伺服扇区到磁盘。

公开(公告)号：US07336435B1

公开(公告)日：2008-02-26

申请号：US11388410

申请日：2006-03-24

申请人： Michael R. Spaur ,  Raymond A. Sandoval

发明人： Michael R. Spaur ,  Raymond A. Sandoval

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G06F3/0634 ,  G06F3/0607 ,  G06F3/0676 ,  G11B2020/1282 ,  G11B2020/1484

摘要： A servo controller for an embedded disk controller comprises a read channel interface that includes a programmable control logic that receives a servo field detected signal from a module that detects a servo field start bit. A memory in the read channel interface is enabled by the programmable control logic for receiving servo field data from a read channel device, wherein the programmable control logic is configured to operate in a first mode and a second mode allowing the servo controller to process servo data from the read channel device. The servo controller processes the servo data using first and second data widths during the first and second modes, respectively.

摘要翻译： 用于嵌入式盘控制器的伺服控制器包括读通道接口，其包括可编程控制逻辑，该可编程控制逻辑从检测伺服字段起始位的模块接收伺服字段检测信号。 读通道接口中的存储器由用于从读通道器件接收伺服字段数据的可编程控制逻辑使能，其中可编程控制逻辑被配置为在第一模式和第二模式下操作，允许伺服控制器处理伺服数据 从读通道设备。 伺服控制器分别在第一和第二模式期间使用第一和第二数据宽度处理伺服数据。

公开(公告)号：US20070206304A1

公开(公告)日：2007-09-06

申请号：US11474837

申请日：2006-06-26

申请人： Kazuhiko Takaishi ,  Tomoyoshi Yamada ,  Masanori Fukushi ,  Tsugito Maruyama ,  Hiroyuki Suzuki

发明人： Kazuhiko Takaishi ,  Tomoyoshi Yamada ,  Masanori Fukushi ,  Tsugito Maruyama ,  Hiroyuki Suzuki

IPC分类号： G11B5/86 ,  G11B21/02

CPC分类号： G11B5/59627 ,  G11B5/59688 ,  G11B2020/1282

摘要： A storing unit stores first correction information for correcting a distortion synchronized with a rotation frequency of servo information of a first disk. A control unit controls positioning of a head on a target track by correcting the servo information of the first disk with the first correction information. Measurement information used for measuring the first correction information is calculated based on second correction information for the servo information in other disk apparatus including a second disk on which the servo information is formed using a common master medium with the first disk.

摘要翻译： 存储单元存储用于校正与第一盘的伺服信息的旋转频率同步的失真的第一校正信息。 控制单元通过用第一校正信息校正第一盘的伺服信息来控制头在目标轨道上的定位。 用于测量第一校正信息的测量信息是根据其他磁盘设备中的伺服信息的第二校正信息计算的，该第二校正信息包括使用具有第一盘的公共主介质形成伺服信息的第二盘。