公开(公告)号：US08947805B1

公开(公告)日：2015-02-03

申请号：US14218036

申请日：2014-03-18

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  Travis Roger Oenning ,  Srinivasan Surendran

IPC: G11B20/10

CPC classification number: G11B20/10296 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10268

Abstract: A receiver utilizes a plurality of read elements, each generating a read-back signal in response to a data track positioned beneath the read element. The plurality of read-back signals are each provided to at least one space-time interference cancellation filter, which generates a filtered output that maximizes a signal associated with one of the plurality of data tracks. The filtered output is provided to a one-dimensional Viterbi detector, which is configured to generate in response an output representative of a data sequence written to one of the plurality of data tracks.

Abstract translation: 接收机利用多个读取元件，每个读取元件响应于位于读取元件下方的数据轨道产生回读信号。 多个读回信号各自被提供给至少一个时空干涉消除滤波器，该滤波器产生使与多个数据轨道之一相关联的信号最大化的滤波输出。 经滤波的输出被提供给一维维特比检测器，其被配置为响应于产生表示写入多个数据轨道之一的数据序列的输出。

公开(公告)号：US08856618B2

公开(公告)日：2014-10-07

申请号：US13645309

申请日：2012-10-04

Applicant: HGST Netherlands B.V.

Inventor： Kei Akiyama ,  Sridhar Chatradhi ,  Jonathan Darrel Coker ,  Martin Aureliano Hassner ,  Kirk Hwang ,  Roger William Wood

IPC: G11C29/00

CPC classification number: G11B5/09 ,  G11B20/1833

Abstract: A technique for recovering of “squeezed” sectors in a set of sequential sectors such as are used in Shingled Magnetic Recording (SMR) is described. Embodiments of the invention use a programmable erased sector recovery scheme, which is a concatenation of a “Cauchy-type” track erasure correction code, together with a media-error correction code that generates N-weighted parity-sectors per track and is capable of replacing up to N-erased sectors per track in any possible combination.

Abstract translation: 描述用于恢复诸如用于混合磁记录（SMR）的一组连续扇区中的“挤压”扇区的技术。 本发明的实施例使用可编程擦除扇区恢复方案，其是“柯西式”轨道擦除校正码的级联，以及每个轨道生成N个加权奇偶校验扇区的媒体纠错码，并且能够 以任何可能的组合替代每个轨道的N个擦除扇区。

公开(公告)号：US20140201590A1

公开(公告)日：2014-07-17

申请号：US13875165

申请日：2013-05-01

Applicant: HGST NETHERLANDS B.V.

Inventor： Jonathan Darrel Coker ,  Richard Leo Galbraith ,  Weldon Mark Hanson ,  Travis Roger Oenning ,  Roger William Wood

IPC: G06F11/10

CPC classification number: H03M13/1102 ,  G11B20/1217 ,  G11B20/1833 ,  H03M13/09 ,  H03M13/27 ,  H03M13/373 ,  H03M13/3761

Abstract: Disk drives are described in which blocks of data spanning multiple sectors are encoded into a plurality of codewords which are then divided into segments that are physically separated (distributed) on the disk surface over multiple sectors in a distributed codeword block so that the codewords have an improved worst case SNR in comparison to individual sectors. This results in more even SNR performance for each codeword, which improves the performance for portions of a track which have lower than the average SNR. Embodiments are described in which the distributed codeword blocks span across tracks.

Abstract translation: 描述了磁盘驱动器，其中跨越多个扇区的数据块被编码成多个码字，然后这些码字被划分成在分布式码字块中的多个扇区上在磁盘表面上物理地分离（分布）的段，使得码字具有 与个别行业相比，改善了最坏情况的信噪比。 这导致针对每个码字的更均匀的SNR性能，这提高了具有低于平均SNR的磁道部分的性能。 描述了其中分布式码字块跨越轨道的实施例。

公开(公告)号：US20140101515A1

公开(公告)日：2014-04-10

申请号：US13645309

申请日：2012-10-04

Applicant: HGST NETHERLANDS B.V.

Inventor： Kei Akiyama ,  Sridhar Chatradhi ,  Jonathan Darrel Coker ,  Martin Aureliano Hassner ,  Kirk Hwang ,  Roger William Wood

IPC: H03M13/05

CPC classification number: G11B5/09 ,  G11B20/1833

Abstract: A technique for recovering of “squeezed” sectors in a set of sequential sectors such as are used in Shingled Magnetic Recording (SMR) is described. Embodiments of the invention use a programmable erased sector recovery scheme, which is a concatenation of a “Cauchy-type” track erasure correction code, together with a media-error correction code that generates N-weighted parity-sectors per track and is capable of replacing up to N-erased sectors per track in any possible combination.

Abstract translation: 描述用于恢复诸如用于混合磁记录（SMR）的一组连续扇区中的“挤压”扇区的技术。 本发明的实施例使用可编程擦除扇区恢复方案，其是“柯西式”轨道擦除校正码的级联，以及每个轨道生成N个加权奇偶校验扇区的媒体纠错码，并且能够 以任何可能的组合替代每个轨道的N个擦除扇区。

公开(公告)号：US08982491B1

公开(公告)日：2015-03-17

申请号：US14031970

申请日：2013-09-19

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  Richard Leo Galbraith ,  Weldon Mark Hanson ,  Travis Roger Oenning ,  Srinivasan Surendran

IPC: G11B5/09 ,  G11B20/12

CPC classification number: G11B20/1217 ,  G11B2020/1232

Abstract: A hard disk drive has disks with data sector preambles that allow for inter-track interference. The same data sector preamble is used for all data sectors in a track but the preamble in each track is different from the preamble in radially adjacent tracks. In a first embodiment each preamble includes a synchronization field (SF) and synchronization mark (SM) that are the same in each track but different from the SF and SM in radially adjacent tracks. Only two unique SFs and two unique SMs are required, with the two SFs and two SMs alternating in radially adjacent tracks. In a second embodiment the preambles are “integrated”, meaning that the preamble is a sequence of bits that does not include separate dedicated fields, like SF and SM. The preamble bit sequences are decoded using matched filters to provide bit synchronization and start-of-data information.

Abstract translation: 硬盘驱动器具有带数据扇区前导码的磁盘，允许进行轨道间干扰。 对于轨道中的所有数据扇区使用相同的数据扇区前同步码，但是每个轨道中的前导码与径向相邻轨道中的前同步码不同。 在第一实施例中，每个前导码包括在每个轨道中相同但与径向相邻轨道中的SF和SM不同的同步字段（SF）和同步标记（SM）。 只需要两个独特的SF和两个独特的SM，两个SF和两个SM在径向相邻的轨道中交替。 在第二实施例中，前导码是“集成的”，这意味着前同步码是不包括单独的专用字段（如SF和SM）的比特序列。 使用匹配滤波器解码前导码比特序列，以提供比特同步和数据开始信息。

公开(公告)号：US08941943B1

公开(公告)日：2015-01-27

申请号：US14100405

申请日：2013-12-09

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  David Robison Hall

IPC: G11B21/02

CPC classification number: G11B5/012

Abstract: A disk drive includes an environmental monitor, a controller and a writing mechanism. The controller acts in response to an output from the environmental monitor to determine if the data capacity of a disk drive could be increased from a first value to a second value. The controller determines the second increased value. The writing mechanism, controlled by the controller, writes data to the disk to realize the increased data capacity of the disk drive. A method for increasing the data capacity of a disk drive from the factory settings for data capacity includes determining if the disk drive is in a favorable or stable environment, writing data to at least one portion of the disk drive at a higher capacity than the factory setting for the at least one portion of the disk drive, and resetting the capacity for at least one portion of the disk drive.

Abstract translation: 磁盘驱动器包括环境监视器，控制器和写入机构。 控制器响应于环境监视器的输出而起作用以确定磁盘驱动器的数据容量是否可以从第一值增加到第二值。 控制器确定第二个增加值。 由控制器控制的写入机制将数据写入磁盘，以实现磁盘驱动器的数据容量增加。 从数据容量的出厂设置增加磁盘驱动器的数据容量的方法包括确定磁盘驱动器是否处于有利或稳定的环境中，以比工厂更高的容量向数据驱动器的至少一部分写入数据 设置磁盘驱动器的至少一部分，并且重置磁盘驱动器的至少一部分的容量。

公开(公告)号：US09489145B2

公开(公告)日：2016-11-08

申请号：US14100702

申请日：2013-12-09

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  David Robison Hall

IPC: G06F3/06

CPC classification number: G06F3/0626 ,  G06F3/0608 ,  G06F3/0644 ,  G06F3/0676

Abstract: A disk drive includes a controller and at least one disk, which may include a first I-region, a second I-region, and an E-region. The first and second I-region may have a first final logical block address (LBA) and a second final LBA, respectively. The controller may be configured to cause information to be written to the first I-region and the second I-region using a first type and a second type of magnetic recording, respectively. The controller also may be configured to set at least one of the first final LBA or the second final LBA to a final LBA value higher than the at least one of the first final LBA or the second final LBA, respectively, after writing user data to at least a portion of the first I-region or the second I-region and without removing the user data.

Abstract translation: 磁盘驱动器包括控制器和至少一个盘，其可以包括第一I区域，第二I区域和E区域。 第一和第二I区域可以分别具有第一最终逻辑块地址（LBA）和第二最终的LBA。 控制器可以被配置为分别使用第一类型和第二类型的磁记录来将信息写入第一I区和第二I区。 控制器还可以被配置为在将用户数据写入到第一最终LBA或第二最终LBA中之后分别将第一最终LBA或第二最终LBA中的至少一个设置为高于第一最终LBA或第二最终LBA中的至少一个的最终LBA值 第一I区域或第二I区域的至少一部分，并且不移除用户数据。

公开(公告)号：US08988807B1

公开(公告)日：2015-03-24

申请号：US14031989

申请日：2013-09-19

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  Richard Leo Galbraith ,  Weldon Mark Hanson ,  Travis Roger Oenning ,  Srinivasan Surendran

IPC: G11B5/09 ,  G11B20/12

CPC classification number: G11B20/1217 ,  G11B2020/1232

Abstract: A hard disk drive has disks with data sector preambles that allow for inter-track interference. The same data sector preamble is used for all data sectors in a track but the preamble in each track is different from the preamble in radially adjacent tracks. In a first embodiment each preamble includes a synchronization field (SF) and synchronization mark (SM) that are the same in each track but different from the SF and SM in radially adjacent tracks. Only two unique SFs and two unique SMs are required, with the two SFs and two SMs alternating in radially adjacent tracks. In a second embodiment the preambles are “integrated”, meaning that the preamble is a sequence of bits that does not include separate dedicated fields, like SF and SM. The preamble bit sequences are decoded using matched filters to provide bit synchronization and start-of-data information.

Abstract translation: 硬盘驱动器具有带数据扇区前导码的磁盘，允许进行轨道间干扰。 对于轨道中的所有数据扇区使用相同的数据扇区前同步码，但是每个轨道中的前导码与径向相邻轨道中的前同步码不同。 在第一实施例中，每个前导码包括在每个轨道中相同但与径向相邻轨道中的SF和SM不同的同步场（SF）和同步标记（SM）。 只需要两个独特的SF和两个独特的SM，两个SF和两个SM在径向相邻的轨道中交替。 在第二实施例中，前导码是“集成的”，这意味着前同步码是不包括单独的专用字段（如SF和SM）的比特序列。 使用匹配滤波器解码前导码比特序列，以提供比特同步和数据开始信息。

公开(公告)号：US08941935B1

公开(公告)日：2015-01-27

申请号：US14203142

申请日：2014-03-10

Applicant: HGST Netherlands B.V.

Inventor： Stephanie Louise Aho ,  Jonathan Darrel Coker ,  David Robison Hall

IPC: G11B27/36

CPC classification number: G11B27/36 ,  G11B5/012 ,  G11B20/1889

Abstract: A magnetic storage system includes a magnetic storage medium, a random-access memory (RAM), and a controller. The controller interfaces with both the magnetic storage medium and the RAM, and implements a refresh algorithm that determines when a data track on the magnetic storage medium should be refreshed. The controller maintains in the magnetic storage medium a plurality of finer-granularity damage count tables, each table having finer-granularity damage counts each representing damage to one or more sectors within each of the plurality of tracks associated with the table. The controller maintains in RAM a plurality of track-level damage count values, each associated with one of the plurality of data tracks and representing estimated damage to one of the plurality of data tracks. Based on data written to the plurality of data tracks, the controller utilizes finer-granularity damage count tables stored in the magnetic media to update the track-level damage.

Abstract translation: 磁存储系统包括磁存储介质，随机存取存储器（RAM）和控制器。 控制器与磁存储介质和RAM接口，并实现一种刷新算法，用于确定何时刷新磁存储介质上的数据轨道。 控制器在磁存储介质中保持多个更细粒度的损伤计数表，每个表具有更细粒度的损伤计数，每个损坏计数表示与与表相关联的多个轨道的每一个内的一个或多个扇区的损坏。 控制器在RAM中保持多个磁道级损伤计数值，每个磁道级损伤计数值与多个数据磁道之一相关联并且表示对多个数据磁道之一的估计的损坏。 基于写入多个数据轨道的数据，控制器利用存储在磁性介质中的细粒度损伤计数表来更新轨迹级损伤。

公开(公告)号：US08922925B1

公开(公告)日：2014-12-30

申请号：US14100566

申请日：2013-12-09

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  David Robison Hall

IPC: G11B20/12

CPC classification number: G11B20/1217 ,  G11B20/10009

Abstract: A disk drive having at least one disk with a major disk surface that includes a first region including a plurality of tracks and a second region including a plurality of tracks. The first and second region are separated by a guard band. The track or tracks near the guard band have a track width that is greater than the track widths of the tracks more distant from the guard band, such as those in the middle of the first and second regions as this reduces the occurrence of far track interference.

Abstract translation: 一种磁盘驱动器，具有至少一个具有主磁盘表面的磁盘，该磁盘表面包括包括多个磁道的第一区域和包括多个轨道的第二区域。 第一和第二区域被保护带隔开。 保护带附近的轨道或轨道的轨道宽度大于远离保护带的轨道的轨道宽度，例如在第一和第二区域中间的轨道的轨道宽度，因为这减少了远轨道干扰的发生 。