Disk drive configured to calculate head rebound distance
    1.
    发明授权
    Disk drive configured to calculate head rebound distance 有权
    磁盘驱动器配置为计算头反弹距离

    公开(公告)号:US07920353B2

    公开(公告)日:2011-04-05

    申请号:US12704033

    申请日:2010-02-11

    IPC分类号: G11B21/02

    CPC分类号: G11B21/12

    摘要: According to one embodiment, a search module searches for a timing when a moving direction of a head changes in order to detect a first timing when the head collides against a stopper of a ramp during a head unload operation and a second timing when the head rebounds as a result of the collision. A calculation module calculates a rebound distance that the head has rebounded based on the first timing and the second timing.

    摘要翻译: 根据一个实施例,当头部移动方向改变时,搜索模块搜索头部变化时的定时,以便在头部卸载操作期间当头部与斜坡的止动件碰撞时检测第一定时,以及当头部反弹时的第二定时 作为碰撞的结果。 计算模块基于第一定时和第二定时计算头部已经反弹的回弹距离。

    Method and apparatus for head positioning using spiral servo patterns in a disk drive
    2.
    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。