Disk drive defining non-circular data tracks relative to a rotation axis of the disk
    1.
    发明授权
    Disk drive defining non-circular data tracks relative to a rotation axis of the disk 有权
    磁盘驱动器定义相对于磁盘的旋转轴的非圆形数据轨道

    公开(公告)号:US08717704B1

    公开(公告)日:2014-05-06

    申请号:US13406797

    申请日:2012-02-28

    IPC分类号: G11B5/58

    CPC分类号: G11B5/58 G11B5/59644

    摘要: A disk drive is disclosed comprising a disk having a plurality of servo tracks defined by servo sectors, and a head actuated over the disk. The disk drive further comprises control circuitry comprising a servo control system operable to position the head over the disk. A disturbance is induced in the servo control system, and while positioning the head over the disk, a data track is accessed. The disturbance induced in the servo control system causes the data track to be non-circular relative to a rotation axis of the disk such that the non-circular data track crosses multiple of the servo tracks over a revolution of the disk.

    摘要翻译: 公开了一种磁盘驱动器,其包括具有由伺服扇区限定的多个伺服磁道的盘,以及在该盘上启动的磁头。 磁盘驱动器还包括控制电路,其包括可操作以将磁头定位在磁盘上的伺服控制系统。 在伺服控制系统中引起干扰,并且当将磁头定位在磁盘上时,可以访问数据磁道。 在伺服控制系统中引起的干扰使得数据轨道相对于盘的旋转轴线是非圆形的,使得非圆形数据轨道在盘的一圈上跨越多个伺服轨道。

    Alternating wedge repeatable runout (WRRO) pattern
    2.
    发明授权
    Alternating wedge repeatable runout (WRRO) pattern 有权
    交替楔形可重复跳动(WRRO)模式

    公开(公告)号:US08693134B1

    公开(公告)日:2014-04-08

    申请号:US13167062

    申请日:2011-06-23

    申请人: Wei Xi Sanghoon Chu

    发明人: Wei Xi Sanghoon Chu

    IPC分类号: G11B5/596 G11B5/09

    CPC分类号: G11B5/59627

    摘要: A disk drive is disclosed comprising a disk, a head actuated over the disk, and a controller. The disk comprises a plurality of data tracks and a plurality of servo wedges, wherein each servo wedge comprises a plurality of wedge repeatable runout (WRRO) fields in a circumferential direction, each of the plurality of WRRO fields including an WRRO compensation value for a different one of the data tracks and having a width that is wider than a width of the respective data track in a radial direction. The controller is configured to read the WRRO compensation value in at least one of the WRRO fields from the disk using the head, and to adjust a position of the head based on the read WRRO compensation value.

    摘要翻译: 公开了一种磁盘驱动器,其包括盘,在盘上致动的头和控制器。 盘包括多个数据轨道和多个伺服楔块,其中每个伺服楔块包括沿圆周方向的多个楔形可重复跳动(WRRO)场,多个WRRO场中的每一个包括用于不同的WRRO补偿值 数据轨道之一并且具有比径向上的相应数据轨道的宽度宽的宽度。 控制器被配置为使用磁头从盘读取至少一个WRRO磁场中的WRRO补偿值,并且根据读取的WRRO补偿值来调整磁头的位置。