Angularly spaced spiral erase for media
    4.
    发明授权
    Angularly spaced spiral erase for media 有权
    用于介质的角度间隔螺旋擦除

    公开(公告)号:US07729076B2

    公开(公告)日:2010-06-01

    申请号:US11750918

    申请日:2007-05-18

    IPC分类号: G11B5/03

    CPC分类号: G11B5/024

    摘要: Embodiments of the present invention allow for media erasure. Various embodiments allow for controlling an actuator based on feedback signal measurements and disk phase to seek a head across a surface of a disk systematically for an erasure operation. Also, in various embodiments, a substantially repeatable seek motion of a head across a stroke may be determined, and launch points at which the head is launched over a disk in the seek motion for erasing at least a portion of the disk are determined based on disk phase.

    摘要翻译: 本发明的实施例允许媒体擦除。 各种实施例允许基于反馈信号测量和磁盘相位来控制致动器,以系统地跨磁盘的表面寻找头以进行擦除操作。 此外,在各种实施例中,可以确定头部横跨笔划的基本上可重复的寻道运动,并且基于用于擦除盘的至少一部分的寻道运动中的磁头在磁盘上发射的发射点基于 磁盘相位。

    ANGULARLY SPACED SPIRAL ERASE FOR MEDIA
    5.
    发明申请
    ANGULARLY SPACED SPIRAL ERASE FOR MEDIA 有权
    用于介质的角膜间隙螺旋细胞

    公开(公告)号:US20070268619A1

    公开(公告)日:2007-11-22

    申请号:US11750918

    申请日:2007-05-18

    IPC分类号: G11B5/596 G11B5/03

    CPC分类号: G11B5/024

    摘要: Embodiments of the present invention allow for media erasure. Various embodiments allow for controlling an actuator based on feedback signal measurements and disk phase to seek a head across a surface of a disk systematically for an erasure operation. Also, in various embodiments, a substantially repeatable seek motion of a head across a stroke may be determined, and launch points at which the head is launched over a disk in the seek motion for erasing at least a portion of the disk are determined based on disk phase.

    摘要翻译: 本发明的实施例允许媒体擦除。 各种实施例允许基于反馈信号测量和磁盘相位来控制致动器,以系统地跨磁盘的表面寻找头以进行擦除操作。 此外,在各种实施例中,可以确定头部横跨笔划的基本上可重复的寻道运动,并且基于用于擦除盘的至少一部分的寻道运动中的磁头在磁盘上发射的发射点基于 磁盘相位。

    Self-servo writing using staged patterning
    6.
    发明授权
    Self-servo writing using staged patterning 有权
    自动伺服写入使用分段图案

    公开(公告)号:US07619846B2

    公开(公告)日:2009-11-17

    申请号:US11750767

    申请日:2007-05-18

    IPC分类号: G11B21/02

    CPC分类号: G11B5/59644

    摘要: An apparatus and method for servo writing are disclosed. The method includes writing of first servo data to a medium, detecting a velocity integrated position of the first servo data, and writing second servo data in relation to the detected position of the first servo data.

    摘要翻译: 公开了一种用于伺服写入的装置和方法。 该方法包括将第一伺服数据写入介质,检测第一伺服数据的速度积分位置,以及相对于检测到的第一伺服数据的位置写入第二伺服数据。

    Multi-stage actuator disk drives, methods, and computer program products that compensate for repeatable runout based on estimated secondary actuator position
    9.
    发明授权
    Multi-stage actuator disk drives, methods, and computer program products that compensate for repeatable runout based on estimated secondary actuator position 有权
    多级执行器磁盘驱动器,方法和计算机程序产品,可根据估计的二次执行器位置补偿可重复的跳动

    公开(公告)号:US07145745B1

    公开(公告)日:2006-12-05

    申请号:US10932717

    申请日:2004-09-02

    IPC分类号: G11B5/596

    CPC分类号: G11B5/5552

    摘要: Methods of compensating for repeatable runout in a disk drive are provided. The disk drive includes a data storage disk, a transducer adjacent to the disk, a primary actuator for positioning the transducer over a first range of movement, and a secondary actuator for positioning the transducer over a second range of movement that is less than the first range of movement. Estimates are made of the position of the secondary actuator in the second range of movement. Data is read from the disk via the transducer. A position error signal is determined based on the read data. Positioning of the transducer by the primary actuator is controlled based on the estimated position of the secondary actuator in the second range of movement and based on the position error signal to compensate for repeatable runout.

    摘要翻译: 提供补偿磁盘驱动器中可重复跳动的方法。 磁盘驱动器包括数据存储盘,与盘相邻的换能器,用于在第一移动范围上定位换能器的主致动器,以及辅助致动器,用于将传感器定位在比第一移动范围小的第二移动范围 运动范围 在第二运动范围内由次级致动器的位置进行估计。 通过传感器从磁盘读取数据。 基于读取的数据确定位置误差信号。 基于在第二移动范围内的辅助致动器的估计位置并且基于位置误差信号来控制由主致动器定位换能器,以补偿可重复的跳动。

    Methods and apparatuses for measuring VCM BEMF at a VCM control update rate
    10.
    发明授权
    Methods and apparatuses for measuring VCM BEMF at a VCM control update rate 有权
    用VCM控制更新速率测量VCM BEMF的方法和装置

    公开(公告)号:US07728539B2

    公开(公告)日:2010-06-01

    申请号:US11750839

    申请日:2007-05-18

    IPC分类号: H02P6/18

    摘要: Devices and methods for performing dynamic sampling of a back electromotive force (BEMF) measurement are provided. A device has hardware, including a voice coil motor (VCM) for receiving a VCM command signal and a correction circuit, for obtaining the VCM command signal and a coil voltage measurement from the hardware, where the correction circuit removes a transient voltage measurement due to a change in the VCM command signal from the coil voltage measurement and outputs an estimated BEMF measurement.

    摘要翻译: 提供了用于执行反电动势(BEMF)测量的动态采样的装置和方法。 一种设备具有硬件,包括用于接收VCM命令信号的音圈电机(VCM)和用于从硬件获得VCM命令信号和线圈电压测量的校正电路,其中校正电路去除由于 来自线圈电压测量的VCM命令信号的变化并输出估计的BEMF测量值。