Storage circuit block and data write-in method
    17.
    发明专利
    Storage circuit block and data write-in method 有权
    存储电路块和数据写入方法

    公开(公告)号:JP2003016774A

    公开(公告)日:2003-01-17

    申请号:JP2001194227

    申请日:2001-06-27

    Abstract: PROBLEM TO BE SOLVED: To solve such a problem that because a current is required to make to flow for each bit line when data are written simultaneously in a plurality of data bits belonging to the same column address, a current required for write-in is enlarged.
    SOLUTION: This device comprises a plurality of pairs of bit line comprising a first bit line and a second bit line, a plurality of storage cells storing information in accordance with the direction of a current flowing in the pair of bit line, at least one current driving source connected to at least one of pairs of bit line and making to flow a current in the first bit line and the second bit line of which the directions of current are reverse each other, at least one switch circuit connecting pairs of bit line and pairs of bit line, and a control circuit controlling a connection state of the switch circuit in accordance with information stored in the storage cell.
    COPYRIGHT: (C)2003,JPO

    Abstract translation: 要解决的问题:为了解决由于在属于同一列地址的多个数据位中同时写入数据时需要为每个位线流动电流的问题,写入所需的电流为 放大 解决方案:该装置包括多对位线,包括第一位线和第二位线,多个存储单元根据在一对位线中流动的电流的方向存储信息,至少一个电流 驱动源连接到位线对中的至少一个并使得流过第一位线中的电流,并且使电流方向彼此相反的第二位线,至少一个连接成对的位线和 一对位线,以及根据存储在存储单元中的信息来控制开关电路的连接状态的控制电路。

    RESTORATION TIME PREDICTION METHOD, RESTORATION TIME PREDICTION DEVICE AND HARD DISK DRIVE

    公开(公告)号:JP2001014107A

    公开(公告)日:2001-01-19

    申请号:JP16623899

    申请日:1999-06-14

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide a restoration time prediction method, a restoration time prediction device and a hard disk drive capable of effectively utilizing power restoration time required for restoration from a standby state and achieving the acceleration of the entire system provided with the hard disk drive. SOLUTION: When a host originates a request for releasing the standby state to this hard disk drive in a standby state, the power restoration time required for the hard disk drive to be restored from the standby state so as to become usable is predicted (S2). Then, the predicted power restoration time is reported to the host (S3). Since a host system recognizes the time required for power restoration, a schedule is made so as to execute a task to be ended within the time interval before the hard disk drive is started and the schedule of the task of the entire system inside the host system is optimized. Thus, the acceleration of the entire system provided with the hard disk drive is achieved.

    BAD SECTOR PROCESSING METHOD OF DISK STORAGE DEVICE, AND DISK STORAGE DEVICE

    公开(公告)号:JP2001005616A

    公开(公告)日:2001-01-12

    申请号:JP16462599

    申请日:1999-06-11

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To eliminate a momentary decrease in performance as much as possible by performing a specific inspection regarding a function in a standby state wherein there is no access from a host. SOLUTION: It is judged whether the disk storage device is in standby mode (S1) and when not, commands from the host which are generated in a specific time are executed (S2) in current execution or after the execution temporarily ends. When it is judged that the device is in standby mode, a read test by a sequential read and a write servo test conducted by positioning a head at a write position are carried out so as to search for a bad sector and a write test by data writing to a specific sector is carried out to judge abnormality of the head. Consequently, when a bad sector is found through the read test or write servo test, it is formed in a preliminary area on a disk and reassigned to an alternative sector and when an abnormality of the head is found through the write test, that is reported to a user (S3).

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