Adjusting clock frequency in a disk drive and a disk system using the same
    2.
    发明授权
    Adjusting clock frequency in a disk drive and a disk system using the same 失效
    调整磁盘驱动器和使用相同的磁盘系统的时钟频率

    公开(公告)号:US06967801B2

    公开(公告)日:2005-11-22

    申请号:US10382002

    申请日:2003-03-04

    摘要: The electromagnetic noise radiated from a magnetic disk system comprising two or more magnetic disk drives is reduced so as not to exceed a certain level although the electromagnetic noise from each magnetic disk drive is added up. This is achieved by setting a different operation clock frequency for each SCSI-ID so that the electromagnetic noise radiated from each magnetic disk drive has a different frequency band.

    摘要翻译: 虽然来自每个磁盘驱动器的电磁噪声相加,但由包括两个或多个磁盘驱动器的磁盘系统辐射的电磁噪声减小到不超过一定水平。 这通过为每个SCSI-ID设置不同的操作时钟频率来实现,使得从每个磁盘驱动器辐射的电磁噪声具有不同的频带。

    Data reproducing apparatus for improving data recording efficiency
    3.
    发明授权
    Data reproducing apparatus for improving data recording efficiency 有权
    用于提高数据记录效率的数据再现装置

    公开(公告)号:US08089717B1

    公开(公告)日:2012-01-03

    申请号:US09638607

    申请日:2000-08-15

    IPC分类号: G11B5/09

    摘要: When the format control circuit detects bit synchronization information in a sector to be reproduced on a magnetic disk, the format control circuit activates a read gate signal for commanding to read out the sector from the magnetic disk. When symbol synchronization information on the magnetic disk is detected, a SYNC detection circuit produces a synchronization information detection signal. The format control circuit calculates an end position of the sector on the magnetic disk on the basis of the synchronization information detection signal to inactivate the read gate signal. The data correction circuit and the decoding circuit reproduce data and ECC in the sector read out from the magnetic disk during the period that the read gate signal is active on the basis of the synchronization information detection signal to produce the data and ECC to a data bus. The data flow control circuit processes the data and ECC on the data bus after the elapse of a reproduction delay time on the basis of the synchronization information detection circuit.

    摘要翻译: 当格式控制电路检测要在磁盘上再现的扇区中的位同步信息时,格式控制电路激活用于命令从磁盘读出扇区的读门信号。 当检测到磁盘上的符号同步信息时,SYNC检测电路产生同步信息检测信号。 格式控制电路基于同步信息检测信号计算磁盘上的扇区的结束位置,以使读取门信号失活。 数据校正电路和解码电路根据同步信息检测信号,在读门信号有效期间从磁盘读出的扇区再现数据和ECC,以产生数据和ECC到数据总线 。 数据流控制电路在同步信息检测电路的基础上经过了再现延迟时间之后,在数据总线上处理数据和ECC。