Disk drive increasing capacity by adjusting a servo gate during write operations
    1.
    发明授权
    Disk drive increasing capacity by adjusting a servo gate during write operations 有权
    磁盘驱动器通过在写入操作期间调整伺服门来增加容量

    公开(公告)号:US08711506B1

    公开(公告)日:2014-04-29

    申请号:US13485373

    申请日:2012-05-31

    IPC分类号: G11B5/09

    CPC分类号: G11B5/5547 G11B5/4886

    摘要: A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors. The disk drive further comprises a head comprising a read element offset linearly from a write element by a gap such that when the disk rotates, the read element reaches a servo sector before the write element. During a first operation, a first length of a beginning of the servo sector is read, and during a write operation, a second length of the beginning of the servo sector shorter than the first length is read to enable data to be written while the read element is over at least part of the servo sector.

    摘要翻译: 公开了一种盘驱动器,其包括由伺服扇区限定的多个伺服轨道的盘。 磁盘驱动器还包括一个磁头,其包括一个读取元件,该读取元件通过间隙与写入元件线性偏移,使得当磁盘旋转时,读取元件在写入元件之前到达伺服扇区。 在第一操作期间,读取伺服扇区的开始的第一长度,并且在写入操作期间,读取比第一长度短的伺服扇区的开始的第二长度,以便在读取时能够写入数据 元件在伺服扇区的至少一部分上。

    Disk drive multiplexing read signal and fly height signal to a transmission line
    2.
    发明授权
    Disk drive multiplexing read signal and fly height signal to a transmission line 有权
    磁盘驱动器将读取信号和飞行高度信号传输到传输线

    公开(公告)号:US08665547B1

    公开(公告)日:2014-03-04

    申请号:US13588999

    申请日:2012-08-17

    IPC分类号: G11B5/02

    摘要: A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors, and a head actuated over the disk, wherein the head comprises a read element operable to generate a read signal. The disk drive further comprises a fly height sensor operable to generate a fly height signal for the head, and control circuitry comprising a multiplexer operable to multiplex the read signal and the fly height signal to a transmission line. The multiplexer is configured to select the read signal when reading the servo sectors of a servo track, and configured to select the fly height signal when reading a segment of the servo track between consecutive servo sectors.

    摘要翻译: 公开了一种磁盘驱动器,其包括盘,该盘包括由伺服扇区定义的多个伺服轨道,以及在该盘上致动的头,其中头包括可读取元件,用于产生读取信号。 磁盘驱动器还包括飞行高度传感器,其可操作以产生用于磁头的飞行高度信号,以及控制电路,其包括多路复用器,可操作以将读取信号和飞行高度信号复用到传输线。 复用器被配置为在读取伺服磁道的伺服扇区时选择读取信号,并且被配置为当在连续伺服扇区之间读取伺服磁道的段时选择飞行高度信号。

    Disk drive adjusting erasure window based on a number of non-read data sectors during a retry operation
    3.
    发明授权
    Disk drive adjusting erasure window based on a number of non-read data sectors during a retry operation 有权
    在重试操作期间基于多个非读取数据扇区的磁盘驱动器调整擦除窗口

    公开(公告)号:US07843660B1

    公开(公告)日:2010-11-30

    申请号:US12277587

    申请日:2008-11-25

    申请人: Teik Ee Yeo

    发明人: Teik Ee Yeo

    IPC分类号: G11B27/36

    摘要: A disk drive is disclosed comprising a disk having a plurality of data tracks, wherein each data track comprises a plurality of data sectors. A head is actuated radially over the disk in order to read one of the data sectors from a target data track on the disk. The data sector is stored in a buffer and decoded with an error correction code (ECC) decoder. When the decode fails, an erasure window is adjusted based on a number of non-read data sectors recorded in the target data track, wherein the erasure window comprises a length spanning at least one ECC symbol in the data sector. The data sector is read from the buffer and decoded with the ECC decoder using the erasure window.

    摘要翻译: 公开了一种磁盘驱动器,包括具有多个数据磁道的磁盘,其中每个数据磁道包括多个数据扇区。 磁头径向地驱动在磁盘上,以从磁盘上的目标数据磁道读取数据扇区中的一个。 数据扇区被存储在缓冲器中并用纠错码(ECC)解码器解码。 当解码失败时,基于记录在目标数据轨道中的多个非读取数据扇区来调整擦除窗口,其中擦除窗口包括跨越数据扇区中的至少一个ECC符号的长度。 从缓冲器中读取数据扇区,并使用擦除窗口使用ECC解码器进行解码。

    Calibrating a defect scan parameter for a disk drive
    4.
    发明授权
    Calibrating a defect scan parameter for a disk drive 失效
    校准磁盘驱动器的缺陷扫描参数

    公开(公告)号:US07656763B1

    公开(公告)日:2010-02-02

    申请号:US11757824

    申请日:2007-06-04

    申请人: Ming Jin Teik Ee Yeo

    发明人: Ming Jin Teik Ee Yeo

    IPC分类号: G11B5/09

    CPC分类号: G11B5/09

    摘要: A method is disclosed for performing a defect scan for a disk drive. Data is recorded on a first data area of a disk substantially free from defects and on a second data area of the disk substantially affected by at least one defect. A defect scan parameter is initialized with an initial setting. The first data area is read to determine a first defect threshold, and the second data area is read to determine a second defect threshold. A margin is saved representing a difference between the first and second defect thresholds. The setting for the defect scan parameter is adjusted, and the elements of reading the first and second data areas and saving a corresponding margin are repeated at least once. A setting is then selected for the defect scan parameter in response to the saved margins.

    摘要翻译: 公开了一种用于执行磁盘驱动器的缺陷扫描的方法。 数据被记录在基本上没有缺陷的盘的第一数据区上,并且被记录在基本上受至少一个缺陷影响的盘的第二数据区上。 初始设置初始化缺陷扫描参数。 读取第一数据区以确定第一缺陷阈值,并且读取第二数据区以确定第二缺陷阈值。 保存余额表示第一和第二缺陷阈值之间的差异。 对缺陷扫描参数的设置进行调整,读取第一和第二数据区域的元素并保存相应的余量至少重复一次。 然后根据保存的边距选择缺陷扫描参数的设置。

    Disk drive selecting TPI profile by estimating head geometry
    5.
    发明授权
    Disk drive selecting TPI profile by estimating head geometry 失效
    磁盘驱动器通过估计头几何来选择TPI轮廓

    公开(公告)号:US07688540B1

    公开(公告)日:2010-03-30

    申请号:US11957616

    申请日:2007-12-17

    IPC分类号: G11B20/20

    摘要: A disk drive is disclosed comprising a disk and a head actuated radially over the disk. The head is positioned over a first radial location, and a first data tracks per inch (TPI—1) is selected for data tracks recorded near the first radial location. The head is positioned over a second radial location, and a second data tracks per inch (TPI—2) is selected for data tracks recorded near the second radial location. The head is positioned over a third radial location, and a third data tracks per inch (TPI—3) is selected for data tracks recorded near the third radial location. A geometry of the head is estimated in response to TPI—1, TPI—2 and TPI—3.

    摘要翻译: 公开了一种磁盘驱动器,包括盘和在盘上径向地致动的磁头。 头部位于第一径向位置上,并且为在第一径向位置附近记录的数据轨道选择每英寸第一数据轨迹(TPI-1)。 头部位于第二径向位置上,并且对于在第二径向位置附近记录的数据轨道选择每英寸第二数据轨迹(TPI-2)。 头部位于第三径向位置上,并且为在第三径向位置附近记录的数据轨道选择每英寸第三数据轨道(TPI-3)。 根据TPI-1,TPI-2和TPI-3估计头部的几何形状。

    Disk drive and method having cost-effective storage of the disk drive's internal program code
    6.
    发明授权
    Disk drive and method having cost-effective storage of the disk drive's internal program code 有权
    磁盘驱动器和方法具有高性价比的存储磁盘驱动器的内部程序代码

    公开(公告)号:US07440214B1

    公开(公告)日:2008-10-21

    申请号:US10427484

    申请日:2003-04-30

    IPC分类号: G11B15/18

    CPC分类号: G11B5/5965

    摘要: Disclosed is a disk drive having a disk, a masked read-only memory (ROM) device, a reprogrammable nonvolatile memory device, and a microprocessor for executing program code. The disk has a magnetic data storage surface with embedded servo wedges for defining data storage tracks including reserve tracks. The masked ROM device stores program code for implementing a spindle motor controller, program code for implementing a portion of a servo controller for track following along a data storage track, and program code for implementing a portion of a disk controller for controlling writing disk data to and reading disk data from the reserve tracks. The reprogrammable nonvolatile memory device stores data parameters relating to the disk drive's configuration. The reserve tracks store program code for implementing a cache control system for controlling caching of disk data in a cache memory.

    摘要翻译: 公开了一种具有盘的磁盘驱动器,掩蔽的只读存储器(ROM)器件,可再编程的非易失性存储器件以及用于执行程序代码的微处理器。 磁盘具有带有嵌入式伺服楔的磁数据存储表面,用于定义包括备用轨道的数据存储轨迹。 被屏蔽的ROM设备存储用于实现主轴电动机控制器的程序代码,用于实现沿着数据存储轨道跟踪的伺服控制器的一部分的程序代码,以及用于实现用于控制将盘数据写入的盘控制器的一部分的程序代码 并从备用磁道读取磁盘数据。 可编程非易失性存储器件存储与磁盘驱动器配置相关的数据参数。 储备跟踪存储程序代码,用于实现用于控制高速缓冲存储器中的磁盘数据的高速缓存的高速缓存控制系统。

    Media defect scan
    7.
    发明授权
    Media defect scan 有权
    介质缺陷扫描

    公开(公告)号:US08094396B1

    公开(公告)日:2012-01-10

    申请号:US12704105

    申请日:2010-02-11

    IPC分类号: G11B27/36

    摘要: A disk drive is disclosed comprising a disk, a head for writing data to the disk, and control circuitry coupled to the head. The control circuitry is operable to write data to the plurality of data tracks, read a first data area of a first data track to generate a first read back signal, determine a first quality metric and a channel flag in response to the first read back signal, determine that the first quality metric exceeds a first threshold, apply additional stress to the first data area, reread the first data area to generate a second read back signal, determine a second quality metric in response to the second read back signal, and determine whether the second quality metric exceeds a second threshold.

    摘要翻译: 公开了一种磁盘驱动器,其包括盘,用于将数据写入盘的头和耦合到头的控制电路。 控制电路可操作以将数据写入多个数据磁道,读取第一数据磁道的第一数据区以产生第一读回信号,响应于第一读回信号确定第一质量度量和信道标志 确定第一质量度量值超过第一阈值,对第一数据区域施加额外的压力,重新读取第一数据区域以产生第二回读信号,响应于第二回读信号确定第二质量度量,并且确定 第二质量度量是否超过第二阈值。