Method and apparatus for head positioning using spiral servo patterns in a disk drive
    4.
    发明授权
    Method and apparatus for head positioning using spiral servo patterns in a disk drive 有权
    在磁盘驱动器中使用螺旋伺服模式进行磁头定位的方法和装置

    公开(公告)号:US07855850B2

    公开(公告)日:2010-12-21

    申请号:US12146622

    申请日:2008-06-26

    IPC分类号: G11B21/12

    摘要: According to one embodiment, a disk drive having a disk, a read head, a servo controller, and a CPU. In the disk, a multi-spiral servo pattern is recorded. The read head reproduces a hexagon-shaped detection signal from the multi-spiral servo pattern. The servo controller generates amplitudes values for respective frames, from the multi-spiral servo pattern. The CPU performs positional-error calculation by using the amplitude values for the frames. Upon detecting a positional change of the head is detected, the CPU performs the positional-error calculation by using the amplitude values generated at the time of replacing the frames with other frames, and corrects the positional error by adding an offset determined from the positional change of the head, to the result of the positional-error calculation.

    摘要翻译: 根据一个实施例,具有盘,读头,伺服控制器和CPU的盘驱动器。 在盘中记录多螺旋伺服模式。 读取头再现来自多螺旋伺服模式的六边形检测信号。 伺服控制器从多螺旋伺服模式产生各个帧的振幅值。 CPU通过使用帧的振幅值来执行位置误差计算。 在检测到检测到头部的位置变化时,CPU通过使用在用其他帧替换帧时产生的振幅值来执行位置误差计算,并且通过将从位置变化确定的偏移相加来校正位置误差 的位置误差计算结果。

    METHOD AND APPARATUS FOR HEAD POSITIONING USING SPIRAL SERVO PATTERNS IN A DISK DRIVE
    9.
    发明申请
    METHOD AND APPARATUS FOR HEAD POSITIONING USING SPIRAL SERVO PATTERNS IN A DISK DRIVE 有权
    在磁盘驱动器中使用螺旋伺服模式进行头部定位的方法和装置

    公开(公告)号:US20090002871A1

    公开(公告)日:2009-01-01

    申请号:US12146622

    申请日:2008-06-26

    IPC分类号: G11B5/00

    摘要: According to one embodiment, a disk drive having a disk, a read head, a servo controller, and a CPU. In the disk, a multi-spiral servo pattern is recorded. The read head reproduces a hexagon-shaped detection signal from the multi-spiral servo pattern. The servo controller generates amplitudes values for respective frames, from the multi-spiral servo pattern. The CPU performs positional-error calculation by using the amplitude values for the frames. Upon detecting a positional change of the head is detected, the CPU performs the positional-error calculation by using the amplitude values generated at the time of replacing the frames with other frames, and corrects the positional error by adding an offset determined from the positional change of the head, to the result of the positional-error calculation.

    摘要翻译: 根据一个实施例,具有盘,读头,伺服控制器和CPU的盘驱动器。 在盘中记录多螺旋伺服模式。 读取头再现来自多螺旋伺服模式的六边形检测信号。 伺服控制器从多螺旋伺服模式产生各个帧的振幅值。 CPU通过使用帧的振幅值来执行位置误差计算。 在检测到检测到头部的位置变化时,CPU通过使用在用其他帧替换帧时产生的振幅值来执行位置误差计算,并且通过将从位置变化确定的偏移相加来校正位置误差 的位置误差计算结果。