Read after write enhancement for bit patterned media
    1.
    发明授权
    Read after write enhancement for bit patterned media 有权
    对位图形媒体进行写入增强后读取

    公开(公告)号:US08035910B2

    公开(公告)日:2011-10-11

    申请号:US11824137

    申请日:2007-06-29

    IPC分类号: G11B5/02

    摘要: A read/write head for use with bit-patterned media detects write synchronization errors between a write clock and the bit-patterned media. In particular, the read/write head writes data to the bit-patterned media using a write clock. The data is then read from the bit-patterned media and used to detect write synchronization errors between the write clock and the location of bit-islands on the bit-patterned media. Based on detected write synchronization errors, the phase associated with the write clock is modified to align the write clock with the location of bit-islands on the bit-patterned media.

    摘要翻译: 用于位图形介质的读/写头检测写时钟和位图形介质之间的写入同步错误。 特别地,读/写头使用写时钟将数据写入位图案介质。 然后从位图形介质读取数据,并用于检测写时钟与位图形介质上位位置之间的写入同步错误。 基于检测到的写同步错误,修改与写时钟相关的相位,以使写时钟与位图形介质上的位岛的位置对齐。

    Read after write enhancement for bit patterned media
    2.
    发明申请
    Read after write enhancement for bit patterned media 有权
    对位图形媒体进行写入增强后读取

    公开(公告)号:US20090002868A1

    公开(公告)日:2009-01-01

    申请号:US11824137

    申请日:2007-06-29

    IPC分类号: G11B5/02 G11B5/09

    摘要: A read/write head for use with bit-patterned media detects write synchronization errors between a write clock and the bit-patterned media. In particular, the read/write head writes data to the bit-patterned media using a write clock. The data is then read from the bit-patterned media and used to detect write synchronization errors between the write clock and the location of bit-islands on the bit-patterned media. Based on detected write synchronization errors, the phase associated with the write clock is modified to align the write clock with the location of bit-islands on the bit-patterned media.

    摘要翻译: 用于位图形介质的读/写头检测写入时钟和位图形介质之间的写入同步错误。 特别地,读/写头使用写时钟将数据写入位图案介质。 然后从位图形介质读取数据,并用于检测写时钟与位图形介质上位位置之间的写同步错误。 基于检测到的写同步错误,修改与写时钟相关的相位,以使写时钟与位图形介质上的位岛的位置对齐。

    Disk drive increasing capacity by adjusting a servo gate during write operations
    3.
    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。

    REDUCED CONVOLUTION FOR REPETITIVE DISTURBANCE REJECTION
    4.
    发明申请
    REDUCED CONVOLUTION FOR REPETITIVE DISTURBANCE REJECTION 有权
    减少反应性干扰的调整

    公开(公告)号:US20070273996A1

    公开(公告)日:2007-11-29

    申请号:US11752684

    申请日:2007-05-23

    IPC分类号: G11B5/09 G11B21/02

    CPC分类号: G11B5/59616 G11B5/59633

    摘要: Methods according to some embodiments include writing servo patterns on a data storage medium including a plurality of timing patterns in response to phase correction values generated using a phase correction value (PCV) kernel having a length that is less than the number of timing patterns on the data storage medium.

    摘要翻译: 根据一些实施例的方法包括:响应于使用长度小于所述定时模式的数量的相位校正值(PCV)内核产生的相位校正值,在包括多个定时模式的数据存储介质上写入伺服模式 数据存储介质。

    Self-servo writing using reference patterns with timing correction
    5.
    发明授权
    Self-servo writing using reference patterns with timing correction 有权
    使用参考模式进行自动伺服写入与定时校正

    公开(公告)号:US08000049B2

    公开(公告)日:2011-08-16

    申请号:US11704750

    申请日:2007-02-09

    IPC分类号: G11B5/02

    CPC分类号: G11B5/59688

    摘要: Methods for writing servo fields on a rotatable data storage disk using reference patterns on the data storage disk include generating a clock signal, reading a reference pattern signal from a surface of the disk, generating a phase error signal in response to a phase offset between the clock signal and the reference pattern signal, subtracting a timing control value from the phase error to provide an adjusted phase error, generating a frequency control signal in response to the adjusted phase error, and adjusting the frequency of the clock signal. The timing control value is generated in response to the phase error signal and the frequency control signal.

    摘要翻译: 使用数据存储盘上的参考图案在可旋转数据存储盘上写入伺服字段的方法包括产生时钟信号,从盘的表面读取参考图形信号,响应于相位偏移产生相位误差信号 时钟信号和参考模式信号,从相位误差减去定时控制值以提供调整的相位误差,响应于调整的相位误差产生频率控制信号,并调整时钟信号的频率。 响应于相位误差信号和频率控制信号产生定时控制值。

    Reduced convolution for repetitive disturbance rejection
    6.
    发明授权
    Reduced convolution for repetitive disturbance rejection 有权
    降低重复干扰抑制的卷积

    公开(公告)号:US07675702B2

    公开(公告)日:2010-03-09

    申请号:US11752684

    申请日:2007-05-23

    IPC分类号: G11B5/02

    CPC分类号: G11B5/59616 G11B5/59633

    摘要: Methods according to some embodiments include writing servo patterns on a data storage medium including a plurality of timing patterns in response to phase correction values generated using a phase correction value (PCV) kernel having a length that is less than the number of timing patterns on the data storage medium.

    摘要翻译: 根据一些实施例的方法包括:响应于使用长度小于所述定时模式的数量的相位校正值(PCV)内核产生的相位校正值,在包括多个定时模式的数据存储介质上写入伺服模式 数据存储介质。