Servo error response system on a magnetic disk device
    1.
    发明授权
    Servo error response system on a magnetic disk device 失效
    磁盘装置上的伺服误差响应系统

    公开(公告)号:US6064535A

    公开(公告)日:2000-05-16

    申请号:US911097

    申请日:1997-08-14

    IPC分类号: G11B19/04 G11B27/36 G11B15/04

    CPC分类号: G11B27/36 G11B19/04

    摘要: A system for halting operation of a hard disk controller when a write operation occurs during a servo positioning error condition including a memory cell for retaining an indication of whether a write operation occurred during the previous servo sector. A memory cell, such as a flip flop, is set on any occurrence of a write operation. With the reading of a next servo field, the output of the first flip flop is latched to a second flip flop. During a present servo sector, a servo positioning error signal is logically AND'ed with a write gate active signal where the write gate active signal is enabled if write gate is active in the present servo sector or write gate was active in the previous servo sector (as indicated by the output from the second flip flop.

    摘要翻译: 一种用于在伺服定位错误状态期间发生写操作时停止硬盘控制器的操作的系统,包括用于保持在先前伺服扇区期间是否发生写操作的指示的存储单元。 任何发生写入操作都会设置一个触发器等存储单元。 通过读取下一个伺服磁场,第一触发器的输出被锁存到第二个触发器。 在当前伺服扇区期间,伺服定位误差信号与写入门有效信号进行逻辑与运算,其中写入门有效信号在当前伺服扇区中写入门有效或写入门在先前的伺服扇区中有效 (由第二个触发器的输出指示。

    Disk drive booting from volatile semiconductor memory when exiting power save mode
    3.
    发明授权
    Disk drive booting from volatile semiconductor memory when exiting power save mode 有权
    退出节电模式时,从易失性半导体存储器启动磁盘驱动器

    公开(公告)号:US08601248B2

    公开(公告)日:2013-12-03

    申请号:US13073032

    申请日:2011-03-28

    申请人: Wayne A. Thorsted

    发明人: Wayne A. Thorsted

    IPC分类号: G06F1/32 G06F15/177

    CPC分类号: G11B19/2072

    摘要: A disk drive is disclosed comprising a head actuated over a disk, a first volatile semiconductor memory (VSM), and a second VSM. When the disk drive is powered on, control circuitry first reads VSM initialization code from the disk, first initializes the first VSM using the VSM initialization code, stores the VSM initialization code in the second VSM, and then enters a power save mode. When exiting the power save mode, the control circuitry second initializes the first VSM using the VSM initialization code stored in the second VSM.

    摘要翻译: 公开了一种磁盘驱动器,包括在磁盘上驱动的磁头,第一易失性半导体存储器(VSM)和第二VSM。 当磁盘驱动器通电时,控制电路首先从磁盘读取VSM初始化代码,首先使用VSM初始化代码初始化第一个VSM,将VSM初始化代码存储在第二个VSM中,然后进入省电模式。 当退出节电模式时,控制电路使用存储在第二VSM中的VSM初始化代码来初始化第一VSM。