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    Track access control system for magnetic disk apparatus
    7.
    发明授权
    Track access control system for magnetic disk apparatus 失效
    磁盘设备的轨道访问控制系统

    公开(公告)号：US4893201A

    公开(公告)日：1990-01-09

    申请号：US202673

    申请日：1988-06-06

    申请人： Teruaki Emori ,  Hiroyuki Mase ,  Ikuo Kitamura

    发明人： Teruaki Emori ,  Hiroyuki Mase ,  Ikuo Kitamura

    IPC分类号： G11B21/10 ,  G11B5/55 ,  G11B21/08

    CPC分类号： G11B5/5547

    摘要： An improved track access control system for a magnetic disk apparatus connectable to a variety of host controllers without any change thereto, and capable of an offset correction. A control unit in the disk apparatus controlling a moving unit to access a magnetic head at a desired track on the magnetic disk in response to a seek command from a host controller and using an offset correction value which is previously obtained by accessing the magnetic head at a track storing the fine positioning information, and carrying out an offset correction, includes a timer to which a time to be offset-updated within a predetermined timing is set. The control unit makes an offset correction value invalid in response to the time out of the timer, and when a seek command from the host controller in response to the offset invalidity is issued within a predetermined time, the control unit carries out an offset correction in response to the seek command, and executes the seek command, or inhibits an output of an index signal, carries out an offset correction at a previously given track from the host controller, and thereafter, permits an output of the index signal. The control unit sets the time for updating the offset correction to the timer.

    Computer apparatus and external storage device which can be used by external power and internal power source
    8.
    发明授权
    Computer apparatus and external storage device which can be used by external power and internal power source 失效
    可由外部电源和内部电源使用的计算机设备和外部存储设备

    公开(公告)号：US5652891A

    公开(公告)日：1997-07-29

    申请号：US279259

    申请日：1994-07-22

    申请人： Ikuo Kitamura ,  Toshiharu Sasaki ,  Manabu Higashiyama ,  Minoru Kimura

    发明人： Ikuo Kitamura ,  Toshiharu Sasaki ,  Manabu Higashiyama ,  Minoru Kimura

    IPC分类号： G06F1/28 ,  G06F1/32 ,  G06F3/06 ,  G06F15/02

    CPC分类号： G06F1/3268 ,  G06F1/3203 ,  Y02B60/1246 ,  Y02B60/32

    摘要： A computer apparatus such as a lap-top type personal computer or the like having a disk device as an external storage device executes a power save process to reduce an electric power consumption on the basis of a power save designation command from an OS. The computer apparatus comprises a computer main body and an external storage device. The computer main body has a power source kind detecting section for generating a power source mode signal indicative of an external power source mode when the use of an external power source is detected and also indicative of an internal power source mode when the use of an internal power source by a battery provided in the apparatus is detected. A power save processing section is provided for the external storage device. When a power save command is received from the computer main body, a check is made to see if the power mode is the external power source mode or the internal power source mode on the basis of the power source mode signal sent from the computer main body. When the external power source mode is discriminated, a power save process to shut off the power supply to a predetermined circuit section is inhibited even if the power save command exists. When the internal power source mode is discriminated, the power save process is executed in accordance with the power save command.

    摘要翻译： 作为具有作为外部存储装置的盘装置的搭载式个人计算机等的计算机装置，根据来自OS的省电指定命令，执行省电处理，以减少电力消耗。 计算机装置包括计算机主体和外部存储装置。 计算机主体具有电源种类检测部分，用于在检测到使用外部电源时产生表示外部电源模式的电源模式信号，并且当使用内部电源模式时表示内部电源模式 检测设置在设备中的电池的电源。 为外部存储装置提供省电处理部。 当从计算机主体接收到省电命令时，根据从计算机主体发送的电源模式信号进行检查以查看电源模式是外部电源模式还是内部电源模式 。 当鉴别出外部电源模式时，即使存在省电命令，也禁止关闭到预定电路部分的电源的省电处理。 当识别内部电源模式时，按照省电命令执行省电处理。