Disk drive writing a sync mark seam in a bootstrap spiral track
    1.
    发明授权
    Disk drive writing a sync mark seam in a bootstrap spiral track 失效
    磁盘驱动器在自举螺旋轨道中写入同步标记接缝

    公开(公告)号:US08634154B1

    公开(公告)日:2014-01-21

    申请号:US13204918

    申请日:2011-08-08

    IPC分类号: G11B5/09

    CPC分类号: G11B5/59661 G11B5/59666

    摘要: A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. A bootstrap spiral track is written to the disk, wherein the bootstrap spiral track comprises a high frequency signal interrupted by sync marks. A first sync mark is written while writing a first part of the bootstrap spiral track, and a second sync mark is written while writing a second part of the bootstrap spiral track. A switch between writing the first sync mark and the second sync mark is made in response to a spindle BEMF voltage, thereby generating a sync mark seam in the bootstrap spiral track.

    摘要翻译: 公开了一种磁盘驱动器,其包括在盘上致动的磁头,以及可操作以旋转磁盘的主轴电机。 引导螺旋轨迹被写入盘,其中自举螺旋轨道包括由同步标记中断的高频信号。 在写入自举螺旋轨道的第一部分时写入第一同步标记,并且在写入自举螺旋轨道的第二部分时写入第二同步标记。 响应于主轴BEMF电压进行写入第一同步标记和第二同步标记之间的切换,从而在自举螺旋轨道中产生同步标记接缝。

    Disk drive detecting when head is on ramp
    3.
    发明授权
    Disk drive detecting when head is on ramp 有权
    磁头驱动器检测磁头在斜坡上时

    公开(公告)号:US08786976B1

    公开(公告)日:2014-07-22

    申请号:US13237727

    申请日:2011-09-20

    IPC分类号: G11B21/02

    CPC分类号: G11B21/12

    摘要: A disk drive is disclosed comprising a head actuated over a disk surface, the head comprising a fly height actuator for controlling a fly height of the head, and a ramp for parking the head. A ramp procedure is executed by applying a control signal to the fly height actuator to decrease the fly height and receiving a corresponding fly height signal, and detecting whether the head is on the ramp in response to the fly height signal.

    摘要翻译: 公开了一种磁盘驱动器,其包括在磁盘表面上致动的磁头,该磁头包括用于控制磁头高度的飞行高度致动器和用于停放磁头的斜坡。 通过向飞行高度致动器施加控制信号以降低飞行高度并接收对应的飞行高度信号,并且响应于飞行高度信号检测磁头是否在斜坡上,执行斜坡程序。