Disk drive spinning down disk to a spin rate based on spin-up parameter
    1.
    发明授权
    Disk drive spinning down disk to a spin rate based on spin-up parameter 有权
    磁盘驱动器将磁盘旋转到基于旋转参数的旋转速率

    公开(公告)号:US08743502B1

    公开(公告)日:2014-06-03

    申请号:US12972091

    申请日:2010-12-17

    IPC分类号: G11B15/46

    摘要: A disk drive comprising a head actuated over a disk, and control circuitry operable to spin the disk at a first spin rate. The control circuitry is further operable to reduce the spin rate of the disk from the first spin rate to a second spin rate, wherein the second spin rate is based on a spin-up parameter associated with spinning up the disk from the second spin rate to the first spin rate. For example, the spin-up parameter may comprise one or more of a spin-up time limit, power setting, and ambient temperature.

    摘要翻译: 一种磁盘驱动器,包括在盘上驱动的磁头,以及可操作以以第一旋转速率旋转磁盘的控制电路。 控制电路进一步可操作以将盘的旋转速率从第一旋转速率降低到第二旋转速率,其中第二旋转速率基于与从第二旋转速率旋转盘相关的旋转参数, 第一个旋转速率。 例如,起动参数可以包括起动时间限制,功率设定和环境温度中的一个或多个。

    Disk drive detecting crack in microactuator
    3.
    发明授权
    Disk drive detecting crack in microactuator 有权
    微型驱动器中的磁盘驱动器检测裂纹

    公开(公告)号:US08335049B1

    公开(公告)日:2012-12-18

    申请号:US12794891

    申请日:2010-06-07

    IPC分类号: G11B5/596

    CPC分类号: G11B19/048 G11B5/5552

    摘要: A disk drive is disclosed comprising a first disk surface, a first head coupled to a distal end of an actuator arm, and a voice coil motor (VCM) and a first microactuator operable to actuate the first head over the first disk surface. A servo loop for servoing the head in response to the servo sectors is disabled, and after disabling the servo loop, the first microactuator is excited with a control signal at a test frequency in order to accentuate a crack in the first microactuator. After exciting the first microactuator, the servo loop is enabled, and after enabling the servo loop, the first microactuator is evaluated to detect the crack in the first microactuator.

    摘要翻译: 公开了一种磁盘驱动器,包括第一磁盘表面,耦合到致动器臂的远端的第一磁头和音圈电动机(VCM)以及可操作以在第一磁盘表面上致动第一磁头的第一微型致动器。 用于响应于伺服扇区伺服磁头的伺服回路被禁用,并且在禁用伺服回路之后,第一微致动器以测试频率的控制信号被激励,以便加强第一微致动器中的裂纹。 在激活第一个微致动器之后,伺服回路被使能,并且在启用伺服回路之后,评估第一微致动器以检测第一微致动器中的裂纹。