公开(公告)号：US20140211337A1

公开(公告)日：2014-07-31

申请号：US14243107

申请日：2014-04-02

Applicant: LSI Corporation

Inventor： Weijun Tan ,  Fan Zhang ,  Shaohua Yang

IPC: G06F11/10 ,  G11B20/18

CPC classification number: G06F11/10 ,  G11B20/10009 ,  G11B20/10287 ,  G11B20/10296 ,  G11B20/1816 ,  G11B20/1883

Abstract: Various embodiments of the present invention provide systems and methods for media defect detection.

Abstract translation: 本发明的各种实施例提供了用于介质缺陷检测的系统和方法。

公开(公告)号：US08760783B2

公开(公告)日：2014-06-24

申请号：US13624234

申请日：2012-09-21

Applicant: LSI Corporation

Inventor： Ming Jin ,  Jun Xiao ,  Fan Zhang ,  Haitao Xia

IPC: G11B20/18

CPC classification number: G11B5/09 ,  G11B20/10037

Abstract: Methods and systems for estimating MRA for a hard disk drive are described. The methods and systems described herein provide for real time estimating and correcting magneto-resistive head asymmetry (MRA) in a hard disk drive using analog-to-digital convertor (ADC) samples or counts. Generally, ADC outputs may be obtained by injecting MRA at known values, where an estimated MRA may be derived in real time by applying an equation using particular ADC output values. Once an estimated MRA is obtained, MRA correction may be performed when the estimated MRA is larger than a threshold value, such as by adjusting a channel MRA compensation coefficient.

Abstract translation: 描述用于估计硬盘驱动器的MRA的方法和系统。 本文描述的方法和系统提供使用模数转换器（ADC）采样或计数来实时估计和校正硬盘驱动器中的磁阻头不对称（MRA）。 通常，可以通过以已知值注入MRA来获得ADC输出，其中可以通过使用特定ADC输出值应用方程实时导出估计MRA。 一旦获得估计的MRA，当估计的MRA大于阈值时，例如通过调整通道MRA补偿系数，可以执行MRA校正。

公开(公告)号：US20140157074A1

公开(公告)日：2014-06-05

申请号：US13692908

申请日：2012-12-03

Applicant: LSI Corporation

Inventor： Fan Zhang ,  Kaitlyn T. Nguyen ,  Jun Xiao

IPC: G06F11/00

CPC classification number: G06F11/0763 ,  G06F11/0727 ,  G06F11/1443 ,  G11B20/10527 ,  G11B20/18 ,  H03M13/1111 ,  H03M13/1191 ,  H03M13/2957 ,  H03M13/3723 ,  H03M13/3738 ,  H03M13/3746 ,  H03M13/3753 ,  H03M13/6325 ,  H03M13/6343

Abstract: Systems, circuits, devices and/or methods related to systems and methods for data processing, and more particularly to systems and methods for re-processing data sets not successfully processed during standard processing.

Abstract translation: 与用于数据处理的系统和方法相关的系统，电路，设备和/或方法，更具体地涉及用于重新处理在标准处理期间未成功处理的数据集的系统和方法。

公开(公告)号：US20140122923A1

公开(公告)日：2014-05-01

申请号：US13661201

申请日：2012-10-26

Applicant: LSI CORPORATION

Inventor： Fan Zhang ,  Shaohua Yang

IPC: G06F11/18

CPC classification number: G06F11/008

Abstract: A method and system is disclosed for identification and removal of a memory sector prone to failure. The method performs satisfaction checks on the memory sector and monitors and stores returned Unsatisfied Checks (USC) for analysis by a pattern recognition algorithm. Once a first global iteration is pattern matched with a second global iteration from the sector, the method determines the period of the repetitive pattern. The method then identifies, as the sector prone to failure, the sector having the defined pattern and period. Once identified, the method uses a power management scheme to remove the sector prone to failure from further use by the memory system and displays to a user the details of the action taken.

Abstract translation: 公开了用于识别和去除容易发生故障的存储器扇区的方法和系统。 该方法对存储器部分进行满意度检查，并通过模式识别算法监视和存储返回的不满意检查（USC）以进行分析。 一旦第一次全局迭代模式与扇区的第二次全局迭代模式匹配，该方法确定重复模式的周期。 然后，该方法识别出具有定义的模式和周期的扇区作为易于发生故障的扇区。 一旦识别出来，该方法使用电源管理方案去除容易发生故障的扇区，以便存储器系统进一步使用，并向用户显示所采取的动作的细节。

公开(公告)号：US20140115431A1

公开(公告)日：2014-04-24

申请号：US13659795

申请日：2012-10-24

Applicant: LSI CORPORATION

Inventor： Fan Zhang ,  Weijun Tan ,  Shaohua Yang

IPC: H03M13/03 ,  G06F11/08

CPC classification number: G06F11/08 ,  G11B20/18 ,  G11B20/1883 ,  H03M13/1111 ,  H03M13/2957 ,  H03M13/3723 ,  H03M13/4138 ,  H03M13/6337 ,  H03M13/6343 ,  H03M13/658

Abstract: Various systems and methods for media defect detection.

Abstract translation: 用于介质缺陷检测的各种系统和方法。

公开(公告)号：US08705192B1

公开(公告)日：2014-04-22

申请号：US13650479

申请日：2012-10-12

Applicant: LSI Corporation

Inventor： Fan Zhang ,  Ming Jin ,  Jun Xiao ,  Shaohua Yang

IPC: G11B5/09

CPC classification number: G11B20/10481 ,  G11B5/012 ,  G11B20/10268 ,  G11B20/10527

Abstract: Aspects of the disclosure pertain to a read channel system and method for providing sector prioritization for promoting improved sector processing performance. The system and method, during processing of sectors of data, prioritize each of the sectors for further processing based upon: a global iteration index of each sector, trapping set characteristics of each sector and processing latency of each sector.

Abstract translation: 本公开的方面涉及用于提供扇区优先级以促进改进的扇区处理性能的读信道系统和方法。 该系统和方法在数据扇区的处理期间，根据以下各项对每个扇区进行优先排序：基于每个扇区的全局迭代索引，捕获每个扇区的集合特征以及每个扇区的处理等待时间。

公开(公告)号：US20140104720A1

公开(公告)日：2014-04-17

申请号：US13650479

申请日：2012-10-12

Applicant: LSI CORPORATION

Inventor： Fan Zhang ,  Ming Jin ,  Jun Xiao ,  Shaohua Yang

IPC: G11B5/09

CPC classification number: G11B20/10481 ,  G11B5/012 ,  G11B20/10268 ,  G11B20/10527

Abstract: Aspects of the disclosure pertain to a read channel system and method for providing sector prioritization for promoting improved sector processing performance. The system and method, during processing of sectors of data, prioritize each of the sectors for further processing based upon: a global iteration index of each sector, trapping set characteristics of each sector and processing latency of each sector.

Abstract translation: 本公开的方面涉及用于提供扇区优先级以促进改进的扇区处理性能的读信道系统和方法。 该系统和方法在数据扇区的处理期间，根据以下各项对每个扇区进行优先排序：基于每个扇区的全局迭代索引，捕获每个扇区的集合特征以及每个扇区的处理等待时间。

公开(公告)号：US20140095961A1

公开(公告)日：2014-04-03

申请号：US13644181

申请日：2012-10-03

Applicant: LSI CORPORATION

Inventor： Fan Zhang ,  Jun Xiao

IPC: H03M13/11

CPC classification number: H03M13/1137 ,  H03M13/114 ,  H03M13/116 ,  H03M13/1515 ,  H03M13/6331 ,  H03M13/6343

Abstract: A system is described for recovering data from a number of sectors, such as the sectors of a hard disk drive (HDD) disk platter, and so forth. The system receives data from the sectors via a read channel and uses a layered data decoder to recover data from the sectors. A memory is coupled with the processor and configured to retain data received from one or more of the sectors, e.g., in retained sector reprocessing (RSR) embodiments. The system is configured to update messages in different circulant layers of the data decoder's parity-check matrix. The system uses one message update order in a processing iteration, and different message update orders in subsequent reprocessing iterations. In some embodiments, layer reordering is used for RSR. In some embodiments, circulant reordering is used for RSR.

Abstract translation: 描述了用于从诸如硬盘驱动器（HDD）盘片等的扇区的多个扇区恢复数据的系统。 系统经由读通道从扇区接收数据，并使用分层数据解码器从扇区恢复数据。 存储器与处理器耦合并且被配置为保留从一个或多个扇区接收的数据，例如在保留的扇区再处理（RSR）实施例中。 该系统被配置为更新数据解码器奇偶校验矩阵的不同循环层中的消息。 系统在处理迭代中使用一个消息更新顺序，并在后续的后处理迭代中使用不同的消息更新顺序。 在一些实施例中，层重排序用于RSR。 在一些实施例中，循环重排序用于RSR。

公开(公告)号：US20140095954A1

公开(公告)日：2014-04-03

申请号：US13629726

申请日：2012-09-28

Applicant: LSI CORPORATION

Inventor： Chung-Li Wang ,  Lei Chen ,  Fan Zhang ,  Shaohua Yang ,  Qi Qi

IPC: H03M13/05

CPC classification number: H03M13/1108 ,  H03M13/3738

Abstract: A LDPC decoder includes a processor for targeted symbol flipping of suspicious bits in a LDPC codeword with unsatisfied checks. All combinations of check indices and variable indices are compiled and correlated into a pool of targeted symbol flipping candidates and returned along with symbol indices to a process that uses such symbol indices to identify symbols to flip in order to break a trapping set.

Abstract translation: LDPC解码器包括用于不满足检查的LDPC码字中的可疑比特的目标符号翻转的处理器。 检查索引和可变索引的所有组合被编译并且相关联到目标符号翻转候选的池中，并且与符号索引一起返回到使用这样的符号索引来识别符号以便打破陷阱集合的过程。

公开(公告)号：US08687301B1

公开(公告)日：2014-04-01

申请号：US13736804

申请日：2013-01-08

Applicant: LSI Corporation

Inventor： Fan Zhang ,  Jun Xiao ,  Haitao Xia

IPC: G11B20/10

CPC classification number: G11B20/1403 ,  G11B20/10268 ,  G11B20/10435 ,  G11B2020/1287

Abstract: The disclosure is directed to detection of a sync mark location for at least one data sector of a disk by processing a first sector and at least a second sector in parallel. A first set of data samples from the first sector is reframed according to one or more sync mark locations based upon a first selected sync mark location, and a second set of data samples from the second sector is reframed according to one or more sync mark locations based upon a second selected sync mark location. The first set of data samples and the second set of data samples are iteratively reframed and decoded until the first sector or the second sector converges or until all possible sync mark locations have been attempted.

Abstract translation: 本公开涉及通过并行处理第一扇区和至少第二扇区来检测盘的至少一个数据扇区的同步标记位置。 基于第一选择的同步标记位置，根据一个或多个同步标记位置来重新编码来自第一扇区的第一组数据样本，并且根据一个或多个同步标记位置重新构造来自第二扇区的第二组数据采样 基于第二选择的同步标记位置。 第一组数据样本和第二组数据样本被迭代地重构和解码，直到第一扇区或第二扇区收敛或直到尝试所有可能的同步标记位置为止。