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    Flex Over Suspension Fault Detection Under a Write Gate for Magnetic Disk Drives
    2.
    发明申请
    Flex Over Suspension Fault Detection Under a Write Gate for Magnetic Disk Drives 有权
    在磁盘驱动器的写入门下的Flex过悬挂故障检测

    公开(公告)号：US20160267938A1

    公开(公告)日：2016-09-15

    申请号：US15067636

    申请日：2016-03-11

    申请人： Texas Instruments Incorporated

    发明人： Rida S. Assaad ,  William M. Torres Escajadillo ,  Mark A. Wolfe

    IPC分类号： G11B20/18 ,  G11B5/09

    CPC分类号： G11B20/18 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10018 ,  G11B20/182 ,  G11B2220/2516

    摘要： A system and method for Flex Over or On Suspension (FOS) fault detection under a write gate for magnetic disk drives may employ a flex over suspension fault comparator that compares a predetermined reference threshold to a positive delta of a disk drive write head data stream and outputs a positive or negative FOS fault indication. A max/min buffer detects polarity of a disk drive read/write head and applies a positive buffered delta to the fault comparator. A transition-free window detector triggers the fault comparator to output the fault indication when a transition-free window of zero-value data bits of a predetermined length is detected from the disk drive head, and the transition-free window detector provides a fault validation signal to validate output of the fault comparator when the transition-free window of zero-value data bits of the predetermined length is detected from the disk drive head.

    摘要翻译： 用于磁盘驱动器的写入口下的用于Flex Over或On Suspension（FOS）故障检测的系统和方法可以采用将预定参考阈值与磁盘驱动器写入头数据流的正增量进行比较的弯曲过载故障比较器， 输出正或负FOS故障指示。 最大/最小缓冲区检测磁盘驱动器读/写头的极性，并向故障比较器应用正缓冲增量。 当从磁盘驱动器头检测到预定长度的零值数据位的无转换窗口时，无转换窗口检测器触发故障比较器输出故障指示，并且无转换窗口检测器提供故障验证 当从磁盘驱动器头检测到预定长度的零值数据位的无转换窗口时，用于确认故障比较器的输出的信号。

    Disk drive calibrating failure threshold based on noise power effect on failure detection metric
    5.
    发明授权
    Disk drive calibrating failure threshold based on noise power effect on failure detection metric 有权
    基于噪声功率影响故障检测度量的磁盘驱动器校准故障阈值

    公开(公告)号：US09053747B1

    公开(公告)日：2015-06-09

    申请号：US13752758

    申请日：2013-01-29

    申请人： Western Digital Technologies, Inc.

    发明人： Baoliang Zhang ,  Carl E. Barlow ,  Chun Sei Tsai

    IPC分类号： G11B5/09 ,  G11B20/18

    CPC分类号： G11B20/182

    摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks, wherein each track comprises a plurality of data sectors. A test pattern is written to at least one data sector in at least one track, and the test pattern is read from the disk to generate a noisy read signal comprising added noise. An estimated data sequence is detected from the noisy read signal, and an amplitude of the added noise is increased until a failure detection metric reaches a metric threshold. A failure threshold is generated based on the amplitude of the added noise when the failure detection metric reaches the metric threshold, and a failure condition of the disk drive is predicted based on the failure threshold.

    摘要翻译： 公开了一种盘驱动器，其包括在包括多个轨道的盘上致动的头，其中每个轨道包括多个数据扇区。 将测试图案写入至少一个轨道中的至少一个数据扇区，并且从盘读取测试图案以产生包括附加噪声的噪声读取信号。 从噪声读取信号检测估计的数据序列，并且增加噪声的幅度直到故障检测度量达到度量阈值。 当故障检测度量达到度量阈值时，基于附加噪声的幅度产生故障阈值，并且基于故障阈值预测磁盘驱动器的故障状况。

    Systems and methods for testing components of a hard disk drive system
    6.
    发明授权
    Systems and methods for testing components of a hard disk drive system 有权
    用于测试硬盘驱动器系统组件的系统和方法

    公开(公告)号：US09013198B1

    公开(公告)日：2015-04-21

    申请号：US14147206

    申请日：2014-01-03

    申请人： Marvell International Ltd.

    发明人： Saeed Azimi ,  Son Hong Ho

    IPC分类号： G01R31/00 ,  G11B20/18 ,  G11B5/455

    CPC分类号： G11B20/182 ,  G01R31/3004 ,  G01R31/31716 ,  G01R31/31717 ,  G11B5/455

    摘要： A hard disk drive system including a controller and a plurality of slave testing modules located in respective components of the hard disk drive system. The controller is arranged on a printed circuit board of the hard disk drive system and is configured to transmit information from the hard disk drive system to a host device, receive information from the host device, and, using a master testing module located in the controller, provide test configuration data corresponding to the information received from the host device. Each of the plurality of slave testing modules is configured to receive the test configuration data from the master testing module and test operation of the respective component of the hard disk drive system using the test configuration data.

    摘要翻译： 一种硬盘驱动器系统，包括位于硬盘驱动器系统的相应部件中的控制器和多个从属测试模块。 控制器设置在硬盘驱动器系统的印刷电路板上，并被配置为将信息从硬盘驱动器系统传送到主机设备，从主机设备接收信息，并且使用位于控制器中的主测试模块 提供与从主机设备接收的信息对应的测试配置数据。 多个从属测试模块中的每一个被配置为从主测试模块接收测试配置数据，并且使用测试配置数据来测试硬盘驱动器系统的各个组件的操作。

    Magnetic recording disk drive with method for recovery of data from failed data sectors
    7.
    发明授权
    Magnetic recording disk drive with method for recovery of data from failed data sectors 有权
    具有从故障数据扇区恢复数据的方法的磁记录磁盘驱动器

    公开(公告)号：US08786972B2

    公开(公告)日：2014-07-22

    申请号：US13680087

    申请日：2012-11-18

    申请人： HGST Netherlands B.V.

    发明人： Michael Konrad Grobis ,  Kurt Allan Rubin

    IPC分类号： G11B5/02 ,  G11C29/00

    CPC分类号： G11B20/1889 ,  G11B20/182 ,  G11B20/1833 ,  G11B2020/1836 ,  G11B2020/185 ,  G11B2220/252

    摘要： A magnetic recording disk drive determines the locations of defective bits in a failed data sector, and allows for the error correction code (ECC) to correctly decode the data from the sector. After a sector has failed decoding, the digitized waveform and the read channel state from the failed sector are stored in memory. A nondata pattern is written to the failed sector and read back to determine the locations of the defective data bits in the failed sector, which are then used to update the read channel state. The data pattern from the failed sector, with the identified bit error locations, is attempted to be decoded. If the decoding is successful then the sector is marked as bad and the correctly decoded data pattern is written to a different region of the disk, for example physical sectors specifically intended for use as spare sectors.

    摘要翻译： 磁记录盘驱动器确定故障数据扇区中的故障位的位置，并允许纠错码（ECC）正确解码扇区中的数据。 在扇区解码失败之后，数字波形和来自故障扇区的读通道状态被存储在存储器中。 将非数据模式写入故障扇区并读回以确定故障扇区中的有缺陷数据位的位置，然后将其用于更新读通道状态。 尝试对来自故障扇区的数据模式与识别的位错误位置进行解码。 如果解码成功，则扇区被标记为坏，并且将正确解码的数据模式写入到盘的不同区域，例如专门用作备用扇区的物理扇区。

    Integrated systems testing
    8.
    发明授权
    Integrated systems testing 有权
    集成系统测试

    公开(公告)号：US08624613B1

    公开(公告)日：2014-01-07

    申请号：US13762682

    申请日：2013-02-08

    申请人： Marvell International Ltd.

    发明人： Saeed Azimi ,  Son Hong Ho

    IPC分类号： G01R31/00

    CPC分类号： G11B20/182 ,  G01R31/3004 ,  G01R31/31716 ,  G01R31/31717 ,  G11B5/455

    摘要： A printed circuit board of a hard disk drive system includes a first component and a plurality of second components of the hard disk drive system. The first component is configured to transmit information to, and receive information from, a host device via a communication interface of the printed circuit board. The first component includes a first testing module operating as a master testing module. Each of the plurality of second components includes a respective second testing module operating as a slave testing module. The first component is connected to each of the plurality of second components and is configured to provide test configuration data to each of the respective second testing modules. The test configuration data corresponds to the information received from the host device, and the test configuration data enables each of the respective second testing modules to test operation of the plurality of second components.

    摘要翻译： 硬盘驱动器系统的印刷电路板包括硬盘驱动器系统的第一部件和多个第二部件。 第一组件被配置为经由印刷电路板的通信接口向主机设备发送信息并从主机设备接收信息。 第一个组件包括作为主测试模块运行的第一测试模块。 多个第二组件中的每一个包括作为从测试模块操作的相应的第二测试模块。 所述第一组件连接到所述多个第二组件中的每一个，并且被配置为向每个相应的第二测试模块提供测试配置数据。 测试配置数据对应于从主机设备接收的信息，并且测试配置数据使得相应的第二测试模块中的每一个测试多个第二组件的操作。

    Adjusting method for recording condition and optical disc device
    9.
    发明授权
    Adjusting method for recording condition and optical disc device 有权
    记录条件和光盘装置的调整方法

    公开(公告)号：US08531932B2

    公开(公告)日：2013-09-10

    申请号：US12608099

    申请日：2009-10-29

    申请人： Yusuke Nakamura ,  Koichiro Nishimura ,  Hiroyuki Minemura ,  Takahiro Kurokawa

    发明人： Yusuke Nakamura ,  Koichiro Nishimura ,  Hiroyuki Minemura ,  Takahiro Kurokawa

    IPC分类号： G11B20/10

    CPC分类号： G11B20/10009 ,  G11B7/1267 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10212 ,  G11B20/10296 ,  G11B20/10481 ,  G11B20/1816 ,  G11B20/182 ,  G11B20/22 ,  G11B20/225 ,  G11B2220/2541 ,  H03M13/41

    摘要： In a optical disc system with constraint length equal to or greater than 5, under assumption that continuous 2T count included in a predetermined evaluation bit array is denoted by i and that length of evaluation bit array of interest is given by (5+2i), judgment is passed on whether binary bit arrays include the evaluation bit array. Previously prepared are the error vectors calculated on the basis of target signals corresponding to the evaluation bit arrays and the target signals derived from the binary bit arrays, and the selection of a desired error vector is performed depending on the result of the judgment. At the same time, an equalized error vector is calculated from the target signal derived from the binary bit array and the reproduced signal, and the inner product of the equalized error vector and the selected error vector is calculated.

    摘要翻译： 在具有等于或大于5的约束长度的光盘系统中，假定包括在预定评估位阵列中的连续2T计数由i表示，并且感兴趣的评估位阵列的长度由（5 + 2i）给出， 传递二进制位数组是否包含评估位数组的判断。 先前准备的是基于对应于评估比特列的目标信号和从二进制位阵列导出的目标信号计算的误差向量，并且根据判断结果执行期望误差向量的选择。 同时，根据从二进制位阵列和再现信号得到的目标信号计算均衡误差向量，并且计算均衡误差向量和所选误差向量的内积。