公开(公告)号：US07839588B1

公开(公告)日：2010-11-23

申请号：US12122710

申请日：2008-05-18

申请人： Dean V. Dang ,  Kek Ming Chua ,  Philip Bernard Saram ,  William J. Seamon

发明人： Dean V. Dang ,  Kek Ming Chua ,  Philip Bernard Saram ,  William J. Seamon

IPC分类号： G11B27/36 ,  G11B5/09

CPC分类号： G11B5/09 ,  G11B20/18 ,  G11B27/36 ,  G11B2020/1896 ,  G11B2220/2516 ,  G11B2220/2525 ,  G11B2220/2537

摘要： Defects are identified in a disk drive by first writing a pattern of tracks to a disk surface in the disk drive, the pattern of tracks including written tracks alternating with unwritten tracks. The written tracks of the pattern of tracks are read, and a defect in a portion of a first written track is detected. An unread portion of a first unwritten track is then identified as comprising a defect based at least in part on the defect in the first written track, the first unwritten track located proximate the first written track.

摘要翻译： 通过首先将磁迹图案写入磁盘驱动器中的磁盘表面，磁盘驱动器中的缺陷被识别，磁道的图案包括与未写入轨道交替的写入轨迹。 读取轨道图案的写入轨迹，并且检测到第一写入轨迹的一部分中的缺陷。 然后将第一未写入轨道的未读部分识别为至少部分地基于第一写入轨道中的缺陷，位于第一写入轨道附近的第一未写入轨道来构成缺陷。

公开(公告)号：US09042045B1

公开(公告)日：2015-05-26

申请号：US11933662

申请日：2007-11-01

申请人： Dean V. Dang ,  Kek Ming Chua ,  King S. Goh ,  Prakash Balasubramaniam ,  Ming Jin

发明人： Dean V. Dang ,  Kek Ming Chua ,  King S. Goh ,  Prakash Balasubramaniam ,  Ming Jin

IPC分类号： G11B27/36 ,  G11B5/09 ,  G11B5/596 ,  G11B20/18 ,  G11B20/12

CPC分类号： G11B20/1816 ,  G11B20/1883 ,  G11B2020/1282 ,  G11B2020/183

摘要： A disk drive is disclosed including a disk having a plurality of sectors, and a head actuated over the disk. A defect threshold is initialized, and a first sector is read to generate a first read signal. The first read signal is processed to detect a defect in the first sector relative to the defect threshold. After detecting the defect, the defect threshold is adjusted and the first sector is reread to generate a second read signal. The second read signal is processed to detect the defect in the first sector relative to the adjusted defect threshold.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个扇区的盘，以及在盘上驱动的磁头。 初始化缺陷阈值，并且读取第一扇区以产生第一读取信号。 处理第一读取信号以相对于缺陷阈值检测第一扇区中的缺陷。 在检测到缺陷之后，调整缺陷阈值并重新读取第一扇区以产生第二读取信号。 处理第二读取信号以相对于调整的缺陷阈值检测第一扇区中的缺陷。

公开(公告)号：US07369340B1

公开(公告)日：2008-05-06

申请号：US11314483

申请日：2005-12-21

申请人： Dean V. Dang ,  Philip Bernard Saram ,  Chakrit Choosang ,  Jonas A. Goode

发明人： Dean V. Dang ,  Philip Bernard Saram ,  Chakrit Choosang ,  Jonas A. Goode

IPC分类号： G11B27/36 ,  G11B5/09

CPC分类号： G11B5/59688

摘要： A disk drive is disclosed comprising a disk having top and bottom surfaces, and top and bottom heads actuated over the top and bottom surfaces, respectively. Control circuitry detects a warping of the disk by writing a first test pattern to the top surface, reading the first test pattern to generate a first read signal, monitoring a first read signal value proportional to an amplitude of the first read signal, writing a second test pattern to the bottom surface, reading the second test pattern to generate a second read signal, monitoring a second read signal value proportional to an amplitude of the second read signal, and processing the first and second read signal values to detect a negative correlation between the amplitudes of the first and second read signals.

摘要翻译： 公开了一种磁盘驱动器，其包括具有顶表面和底表面的盘，并且顶顶和底头分别在顶表面和底表面上被致动。 控制电路通过向第一表面写入第一测试图案来检测盘的翘曲，读取第一测试图案以产生第一读取信号，监测与第一读取信号的幅度成比例的第一读取信号值，写入第二读取信号 测试图案到底面，读取第二测试图案以产生第二读取信号，监测与第二读取信号的幅度成比例的第二读取信号值，以及处理第一和第二读取信号值以检测第一和第二读取信号之间的负相关性 第一和第二读信号的振幅。

公开(公告)号：US08749910B1

公开(公告)日：2014-06-10

申请号：US13465716

申请日：2012-05-07

申请人： Dean V. Dang ,  Colin W. Morgan ,  Philip Bernard Saram

发明人： Dean V. Dang ,  Colin W. Morgan ,  Philip Bernard Saram

IPC分类号： G11B5/02

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5534

摘要： Disclosed is a disk drive that is operable with a host computer that includes a printed circuit board assembly (PCBA) having a system on a chip (SOC). The disk drive comprises: a hard disk drive assembly (HDA); and a non-volatile semiconductor memory (NVSM). The NVSM is located in the HDA and is couplable to the SOC of the host computer. The NVSM is configured to store configuration data for disk drive operation. The configuration data is configured to be retrieved by the SOC for controlling disk drive operations.

摘要翻译： 公开了一种可与主计算机一起操作的磁盘驱动器，该主计算机包括具有片上系统（SOC）的印刷电路板组件（PCBA）。 磁盘驱动器包括：硬盘驱动器组件（HDA）; 和非易失性半导体存储器（NVSM）。 NVSM位于HDA中，可与主机的SOC耦合。 NVSM配置为存储用于磁盘驱动器操作的配置数据。 配置数据被配置为由用于控制磁盘驱动器操作的SOC来检索。

公开(公告)号：US08755141B1

公开(公告)日：2014-06-17

申请号：US13465672

申请日：2012-05-07

申请人： Dean V. Dang

发明人： Dean V. Dang

IPC分类号： G11B5/02

CPC分类号： G11B5/5534 ,  G11B5/012 ,  G11B20/10

摘要： Disclosed is a disk drive that is operable with a host computer that includes a printed circuit board assembly (PCBA) having a system on a chip (SOC). The disk drive comprises: a hard disk drive assembly (HDA); and a non-volatile semiconductor memory (NVSM). The NVSM is located within a preamplifier of the HDA and is couplable to the SOC of the host computer. The NVSM is configured to store configuration data for disk drive operation. The configuration data is configured to be retrieved by the SOC for controlling disk drive operations.

摘要翻译： 公开了一种可与主计算机一起操作的磁盘驱动器，该主计算机包括具有片上系统（SOC）的印刷电路板组件（PCBA）。 磁盘驱动器包括：硬盘驱动器组件（HDA）; 和非易失性半导体存储器（NVSM）。 NVSM位于HDA的前置放大器内，可与主机的SOC耦合。 NVSM配置为存储用于磁盘驱动器操作的配置数据。 配置数据被配置为由用于控制磁盘驱动器操作的SOC检索。

公开(公告)号：US07224546B1

公开(公告)日：2007-05-29

申请号：US10769401

申请日：2004-01-31

申请人： Gokhan Orakcilar ,  Steven Nemshick ,  Ashok K. Desai ,  Robert P. Ryan ,  Dean V. Dang ,  Lakshman Rathnam ,  Thomas A. Tacklind

发明人： Gokhan Orakcilar ,  Steven Nemshick ,  Ashok K. Desai ,  Robert P. Ryan ,  Dean V. Dang ,  Lakshman Rathnam ,  Thomas A. Tacklind

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B21/12 ,  G11B19/20

摘要： A disk drive is disclosed comprising a disk and a voice coil motor (VCM) for rotating an actuator arm about a pivot in order to actuate a head over the disk. During a park operation, a latching characteristic associated with latching the actuator arm is measured and used to configure a latching parameter that reduces acoustic noise. The latching parameter is used to latch the actuator arm by seeking the head to a latching track, maintaining the head over the latching track for a predetermined interval, applying an acceleration pulse to the VCM for an acceleration pulse period, applying a braking pulse to the VCM for a brake pulse period, and applying a latching current to the VCM.

摘要翻译： 公开了一种磁盘驱动器，其包括盘和音圈马达（VCM），用于围绕枢轴旋转致动器臂，以便在盘上致动头部。 在驻车操作期间，测量与锁定致动器臂相关联的闩锁特性并用于构造减小声学噪声的锁定参数。 锁定参数用于通过寻找头部到锁定轨道来锁定致动器臂，将头部保持在锁定轨道上预定的间隔，向VCM施加加速度脉冲用于加速度脉冲周期，将制动脉冲施加到 VCM用于制动脉冲周期，并向VCM施加锁存电流。