公开(公告)号：US20140140182A1

公开(公告)日：2014-05-22

申请号：US13680497

申请日：2012-11-19

Applicant: LSI CORPORATION

Inventor： Scott M. Dziak ,  Ming Jin ,  Jonathan Dykhuis

IPC: G11B27/36

CPC classification number: G11B27/36 ,  G11B20/182 ,  G11B2220/2516

Abstract: The disclosure is directed to a system and method for detecting and classifying at least one media defect. A periodic pattern is written to a medium to yield at least one waveform. The magnitude of the waveform is compared against a defect threshold to detect the presence or absence of media defects in the medium. When at least one defect is detected, a magnitude for each of at least two harmonics of the waveform is determined in the defect range. The defect is classified by comparing a ratio of the magnitudes of the at least two harmonics against a classification threshold.

Abstract translation: 本公开涉及用于检测和分类至少一个介质缺陷的系统和方法。 将周期性图案写入介质以产生至少一个波形。 将波形的大小与缺陷阈值进行比较，以检测介质中是否存在介质缺陷。 当检测到至少一个缺陷时，在缺陷范围内确定波形的至少两个谐波中的每一个的幅度。 通过比较至少两个谐波的幅度与分类阈值的比值来分类缺陷。

公开(公告)号：US20130148230A1

公开(公告)日：2013-06-13

申请号：US13690435

申请日：2012-11-30

Applicant: LSI Corporation

Inventor： Ming Jin ,  Erich F. Haratsch ,  Jason S. Goldberg ,  Kurt J. Worrell ,  Scott M. Dziak ,  Jeffrey P. Grundvig

IPC: G11B27/36

CPC classification number: G11B27/36 ,  G11B5/6076 ,  G11B2220/2516

Abstract: A contact event between a sensing device and a storage medium is detected by receiving a signal indicating a physical proximity between the sensing device and the storage medium; generating a plurality of frequency bin outputs; comparing one or more frequency bin outputs to a corresponding first level threshold to yield a corresponding comparator output; summing the comparator output with at least one prior instance of the comparator output to yield an aggregated value; comparing the aggregated value to an aggregate threshold to yield an aggregate output; and generating a contact event output if one or more of a first group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value and a predefined minimum number of a second group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value.

Abstract translation: 通过接收指示感测装置和存储介质之间的物理接近的信号来检测感测装置和存储介质之间的接触事件; 产生多个频率仓输出; 将一个或多个频率仓输出与相应的第一电平阈值进行比较以产生相应的比较器输出; 将比较器输出与比较器输出的至少一个先前实例相加以产生聚合值; 将聚合值与聚合阈值进行比较以产生总产出; 以及如果所述多个频率仓输出中的第一组中的一个或多个具有设置为预定二进制值的相关联的聚合输出并且所述多个频率仓输出中的第二组的预定最小数量具有 关联的聚合输出设置为预定义的二进制值。

公开(公告)号：US09111573B1

公开(公告)日：2015-08-18

申请号：US14248943

申请日：2014-04-09

Applicant: LSI Corporation

Inventor： Siva Swaroop Vontela ,  Scott M. Dziak

IPC: G11B5/09 ,  G11B20/10 ,  G11B20/12

CPC classification number: G11B20/10046 ,  G11B20/10009 ,  G11B20/1217

Abstract: A method and system for detecting an end of a preamble without interpolation. The method includes receiving information from a zero phase start module, the information including a target phase constraint, a polyant, and a zero phase start phase. The method also includes selecting two samples per preamble cycle of short filter outputs and long filter outputs based on the target phase constraint, the polyant, and the zero phase start phase. The method further includes decimating the short filter outputs and the long filter outputs such that the selected two samples for each of the filters per preamble cycle are output upon decimation. The method additionally includes performing a sign comparison on the corresponding short filter and long filter outputs after decimation, wherein a sign mismatch of the corresponding short filter and long filter outputs indicates an end of a preamble.

Abstract translation: 一种用于在不进行插值的情况下检测前导码的结束的方法和系统。 所述方法包括从零相位起始模块接收信息，所述信息包括目标相位约束，聚合物和零相起始相位。 该方法还包括基于目标相位约束，聚合和零相位起始阶段，选择每个前导码周期的短滤波器输出和长滤波器输出两个样本。 该方法还包括对短滤波器输出和长滤波器输出进行抽取，使得每个前同步码周期中的每个滤波器的选择的两个采样在抽取时输出。 该方法还包括在抽取之后对相应的短滤波器和长滤波器输出执行符号比较，其中相应的短滤波器和长滤波器输出的符号失配表示前导码的结束。

公开(公告)号：US20150243321A1

公开(公告)日：2015-08-27

申请号：US14220211

申请日：2014-03-20

Applicant: LSI Corporation

Inventor： Kurt J. Worrell ,  Jason D. Byrne ,  Scott M. Dziak

IPC: G11B20/10 ,  G11B20/12

CPC classification number: G11B20/1024 ,  G11B20/10222 ,  G11B20/1217 ,  G11B2020/1232 ,  G11B2020/1242

Abstract: An exemplary hard disk (HD) track has a full overhead section followed by user sections interleaved with intervening partial overhead sections that are too short for an HD drive (HDD) to attain sufficient timing lock using only one partial overhead section, but long enough for the drive to attain sufficient timing lock using multiple partial overhead sections to read user data from the user section immediately following the partial overhead section where sufficient timing lock is attained. The drive begins, but does not finish, attaining timing lock based on the first partial overhead section, but the drive does finish attaining timing lock based on the last partial overhead section. The drive can also read user data in subsequent user sections by maintaining or re-attaining sufficient timing lock using each successive partial overhead section. Increased user data storage is achieved without significantly impacting average latency of HDD read sessions compared to conventional HD drives.

Abstract translation: 示例性硬盘（HD）轨道具有完整的开销部分，其后是与HD驱动器（HDD）太短的中间部分开销部分交错的用户部分，以仅使用一个部分开销部分来获得足够的定时锁定，但足够长 使用多个部分开销部分来获得充分的定时锁定的驱动器，以便在紧接在获得足够的定时锁定的部分开销部分之后的用户部分中读取用户数据。 驱动器开始但没有完成，基于第一部分开销部分获得定时锁定，但驱动器完成基于最后部分开销部分获得定时锁定。 驱动器还可以通过使用每个连续部分开销部分维持或重新获得足够的定时锁定来读取后续用户部分中的用户数据。 实现与常规HD驱动器相比，增加的用户数据存储不会明显影响HDD读取会话的平均延迟。

公开(公告)号：US20150243311A1

公开(公告)日：2015-08-27

申请号：US14217783

申请日：2014-03-18

Applicant: LSI Corporation

Inventor： Jeffrey P. Grundvig ,  Richard Rauschmayer ,  Scott M. Dziak

IPC: G11B5/596 ,  G06F17/30

CPC classification number: G11B5/4886 ,  G06F17/30424 ,  G11B5/09 ,  G11B5/3958 ,  G11B5/3967 ,  G11B5/3977 ,  G11B5/4866 ,  G11B5/59616 ,  G11B5/59627 ,  G11B5/59644 ,  G11B20/10259

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for reporting a synchronization indication and for applying a synchronization window. As an example, a system is discussed that includes: a head assembly including a first read head and a second read head; a down track distance calculation circuit operable to calculate a down track distance between the first read head and the second read head; and a synchronization mark detection circuit. The synchronization mark detection circuit is operable to: assert a synchronization mark window based at a location based at least in part on the down track distance; query a first data set derived from the first read head for a synchronization mark occurring within the synchronization mark window; and query a second data set derived from the second read head for the synchronization mark occurring within the synchronization mark window.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及用于报告同步指示和应用同步窗口的系统和方法。 作为示例，讨论了包括：包括第一读取头和第二读取头的头组件的系统; 下行轨道距离计算电路，用于计算第一读取头和第二读取头之间的下行轨迹距离; 和同步标记检测电路。 同步标记检测电路可操作用于：至少部分地基于下行轨道距离，在至少一个位置处断言同步标记窗口; 查询从所述第一读取头导出的用于同步标记窗口内出现的同步标记的第一数据集; 并且查询从同步标记窗口中出现的用于同步标记的从第二读取头导出的第二数据集。

公开(公告)号：US09026891B2

公开(公告)日：2015-05-05

申请号：US13831246

申请日：2013-03-14

Applicant: LSI Corporation

Inventor： Scott M. Dziak ,  Jeffrey P. Grundvig ,  Jason D. Byrne

IPC: G11C29/00 ,  G11B27/30 ,  G11B20/12 ,  G06F11/10 ,  G11B20/10

CPC classification number: G11B27/3027 ,  G06F11/1076 ,  G11B20/1217 ,  G11B2020/10916 ,  G11B2020/1232

Abstract: A method and system for performing a shortened acquire cycle for at least one fragment of at least one data sector having coherently written fragments, the coherently written fragments being written during a single rotation of a storage medium. The method includes performing a full acquire cycle for a first fragment of a particular data sector of the at least one data sector. The method further includes reusing at least a portion of the acquisition information of the first fragment to perform a shortened acquire cycle for at least one subsequent coherently written fragment. The method also includes reusing at least a portion of the acquisition information of the first fragment to perform a shortened acquire cycle for at least one subsequent coherently written fragment. Additionally, the method includes performing the shortened acquire cycle for the at least one subsequent coherently written fragment.

Abstract translation: 一种用于对具有相干写入的片段的至少一个数据扇区的至少一个片段执行缩短的获取周期的方法和系统，所述相干写入的片段在存储介质的单次旋转期间被写入。 该方法包括对至少一个数据扇区的特定数据扇区的第一片段执行完整采集周期。 该方法还包括重新使用第一片段的获取信息的至少一部分来对至少一个随后的相干写入片段执行缩短的获取周期。 该方法还包括重新利用第一片段的获取信息的至少一部分来对至少一个随后的相干写入片段执行缩短的获取周期。 另外，该方法包括对所述至少一个随后的相干写入片段执行缩短的获取周期。

公开(公告)号：US08773809B2

公开(公告)日：2014-07-08

申请号：US13690435

申请日：2012-11-30

Applicant: LSI Corporation

Inventor： Ming Jin ,  Erich F. Haratsch ,  Jason S. Goldberg ,  Kurt J. Worrell ,  Scott M. Dziak ,  Jeffrey P. Grundvig

IPC: G11B21/02

CPC classification number: G11B27/36 ,  G11B5/6076 ,  G11B2220/2516

Abstract: A contact event between a sensing device and a storage medium is detected by receiving a signal indicating a physical proximity between the sensing device and the storage medium; generating a plurality of frequency bin outputs; comparing one or more frequency bin outputs to a corresponding first level threshold to yield a corresponding comparator output; summing the comparator output with at least one prior instance of the comparator output to yield an aggregated value; comparing the aggregated value to an aggregate threshold to yield an aggregate output; and generating a contact event output if one or more of a first group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value and a predefined minimum number of a second group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value.

Abstract translation: 通过接收指示感测装置和存储介质之间的物理接近的信号来检测感测装置和存储介质之间的接触事件; 产生多个频率仓输出; 将一个或多个频率仓输出与相应的第一电平阈值进行比较以产生相应的比较器输出; 将比较器输出与比较器输出的至少一个先前实例相加以产生聚合值; 将聚合值与聚合阈值进行比较以产生总产出; 以及如果所述多个频率仓输出中的第一组中的一个或多个具有设置为预定二进制值的相关联的聚合输出并且所述多个频率仓输出中的第二组的预定最小数量具有 关联的聚合输出设置为预定义的二进制值。

公开(公告)号：US09147430B2

公开(公告)日：2015-09-29

申请号：US14220211

申请日：2014-03-20

Applicant: LSI Corporation

Inventor： Kurt J. Worrell ,  Jason D. Byrne ,  Scott M. Dziak

IPC: G11B5/09 ,  G11B20/10 ,  G11B20/12

CPC classification number: G11B20/1024 ,  G11B20/10222 ,  G11B20/1217 ,  G11B2020/1232 ,  G11B2020/1242

Abstract: An exemplary hard disk (HD) track has a full overhead section followed by user sections interleaved with intervening partial overhead sections that are too short for an HD drive (HDD) to attain sufficient timing lock using only one partial overhead section, but long enough for the drive to attain sufficient timing lock using multiple partial overhead sections to read user data from the user section immediately following the partial overhead section where sufficient timing lock is attained. The drive begins, but does not finish, attaining timing lock based on the first partial overhead section, but the drive does finish attaining timing lock based on the last partial overhead section. The drive can also read user data in subsequent user sections by maintaining or re-attaining sufficient timing lock using each successive partial overhead section. Increased user data storage is achieved without significantly impacting average latency of HDD read sessions compared to conventional HD drives.

Abstract translation: 示例性硬盘（HD）轨道具有完整的开销部分，其后是与HD驱动器（HDD）太短的中间部分开销部分交错的用户部分，以仅使用一个部分开销部分来获得足够的定时锁定，但足够长 使用多个部分开销部分来获得充分的定时锁定的驱动器，以便在紧接在获得足够的定时锁定的部分开销部分之后的用户部分中读取用户数据。 驱动器开始但没有完成，基于第一部分开销部分获得定时锁定，但驱动器完成基于最后部分开销部分获得定时锁定。 驱动器还可以通过使用每个连续部分开销部分维持或重新获得足够的定时锁定来读取后续用户部分中的用户数据。 实现与常规HD驱动器相比，增加的用户数据存储不会明显影响HDD读取会话的平均延迟。

公开(公告)号：US20140281818A1

公开(公告)日：2014-09-18

申请号：US13831246

申请日：2013-03-14

Applicant: LSI CORPORATION

Inventor： Scott M. Dziak ,  Jeffrey P. Grundvig ,  Jason D. Byrne

IPC: G11B27/30 ,  G11B20/18 ,  G11B20/12 ,  G06F11/10

CPC classification number: G11B27/3027 ,  G06F11/1076 ,  G11B20/1217 ,  G11B2020/10916 ,  G11B2020/1232

Abstract: A method and system for performing a shortened acquire cycle for at least one fragment of at least one data sector having coherently written fragments, the coherently written fragments being written during a single rotation of a storage medium. The method includes performing a full acquire cycle for a first fragment of a particular data sector of the at least one data sector. The method further includes reusing at least a portion of the acquisition information of the first fragment to perform a shortened acquire cycle for at least one subsequent coherently written fragment. The method also includes reusing at least a portion of the acquisition information of the first fragment to perform a shortened acquire cycle for at least one subsequent coherently written fragment. Additionally, the method includes performing the shortened acquire cycle for the at least one subsequent coherently written fragment.

Abstract translation: 一种用于对具有相干写入的片段的至少一个数据扇区的至少一个片段执行缩短的获取周期的方法和系统，所述相干写入的片段在存储介质的单次旋转期间被写入。 该方法包括对至少一个数据扇区的特定数据扇区的第一片段执行完整采集周期。 该方法还包括重新使用第一片段的获取信息的至少一部分来对至少一个随后的相干写入片段执行缩短的获取周期。 该方法还包括重新利用第一片段的获取信息的至少一部分来对至少一个随后的相干写入片段执行缩短的获取周期。 另外，该方法包括对所述至少一个随后的相干写入片段执行缩短的获取周期。

公开(公告)号：US09025265B1

公开(公告)日：2015-05-05

申请号：US14230532

申请日：2014-03-31

Applicant: LSI Corporation

Inventor： Scott M. Dziak ,  Richard Rauschmayer ,  Jason D. Byrne

IPC: G11B27/36 ,  G11B20/10

CPC classification number: G11B27/36 ,  G11B20/10009 ,  G11B20/10027

Abstract: A method and system for providing format savings in data sectors. The method includes receiving a signal outputted from an analog-to-digital conversion circuit. The method further includes shifting a signal phase of the signal based at least upon a corrected phase at an output of a phase loop and a phase measured when the signal was digitally sampled by the analog-to-digital conversion circuit. The method also includes adjusting a gain of the signal based at least upon a current gain loop correction and a gain correction made when the signal was digitally sampled by the analog-to-digital conversion circuit. Additionally, the method includes adjusting the signal based at least upon an output of a current offset correction and an offset correction made when the signal was digitally sampled by the analog-to-digital conversion circuit. The method also includes outputting an adjusted signal to a sync mark detector.

Abstract translation: 一种用于在数据扇区中提供格式节省的方法和系统。 该方法包括接收从模拟 - 数字转换电路输出的信号。 该方法还包括至少基于在相位环路的输出处的校正相位和当信号由模数转换电路进行数字采样时测量的相位来移位信号的信号相位。 该方法还包括至少基于当前增益环路校正和当信号被模数转换电路进行数字采样时进行的增益校正来调整信号的增益。 此外，该方法包括至少基于当前偏移校正的输出和当信号由模数转换电路进行数字采样时进行的偏移校正来调整信号。 该方法还包括将经调整的信号输出到同步标记检测器。