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    Cache system adopting an LRU system
    32.
    发明公开
    Cache system adopting an LRU system 失效
    高速缓存安排与LRU方法。

    公开(公告)号：EP0452991A2

    公开(公告)日：1991-10-23

    申请号：EP91110603.7

    申请日：1986-05-28

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

    Inventor： Furuya, Akihiko, c/o Patent Division ,  Kanamaru, Kouiti, c/o Patent Division ,  Inoue, Junichi

    IPC: G06F12/08 ,  G06F12/12

    CPC classification number: G06F3/0601 ,  G06F11/1415 ,  G06F12/0866 ,  G06F12/126 ,  G06F2003/0691 ,  G06F2212/312

    Abstract: The present invention provides a cache system comprising a cache memory in which the number of write cycles to a disk is decreased by using write command receiving bits in the entries of a directory memory (35) and by using a specified write instruction designation bit in the W-command in such a way, that in the case of a specified W-command it is checked if there are N or more entries whose write command receiving bits are set, i.e. if there are N or more blocks which have been written in cache memory but not yet in the disk, so that, if a cache hit is detected in the case of the disk write command whose specified write construction designation bit is set, the corresponding write data is registered only in the cache if the number of blocks not written in the disk is smaller than N. In this way a disk write operation is always performed in response to a disk write instruction from a host system, even in the case that the cache hit occurs.

    Cache system adopting an LRU system, and magnetic disk controller incorporating it
    34.
    发明公开
    Cache system adopting an LRU system, and magnetic disk controller incorporating it 失效
    采用LRU系统的缓存系统及其配套的磁盘控制器

    公开(公告)号：EP0203601A3

    公开(公告)日：1989-07-12

    申请号：EP86107284.1

    申请日：1986-05-28

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

    Inventor： Furuya, Akihiko ,  Kanamaru, Kouiti ,  Inoue, Junichi

    IPC: G06F12/08 ,  G06F12/12 ,  G06F3/06

    CPC classification number: G06F3/0601 ,  G06F11/1415 ,  G06F12/0866 ,  G06F12/126 ,  G06F2003/0691 ,  G06F2212/312

    Abstract: According to a magnetic disk controller incorporating a disk cache system, an arbitrary LRU value and a resident bit for inhibiting replacement of a corresponding block are added to a read/write command. Each entry of a directory memory (35 1 ) has a disk block address field, an LRU counter for storing the arbitrary LRU value, a write command receiving bit field representing non- writing of write data in the disk unit, the write data being accessed by the host system, a resident bit field for inhibiting replacement of the corresponding block, and a disk drive identifier field (LUN) representing the corresponding magnetic disk drive unit (10, through 10 4 ). The LRU setting value added to the read/write command is registered in the LRU counter field of the entry corresponding to the block to be replaced. If the number of data is smaller than a maximum number of blocks to be written in the disk unit, writing is performed for the corresponding block in the cache memory. The resident bit of the entry to be replaced is set/reset in response to the read instruction. If a read error occurs, the cache block to be replaced is divided into subunits on the basis of a sector next to that the number of which is read, a start sector fo the disk area data which is to be transferred to the host system, and a last sector thereof. A transfer start cache address, the number of transfer sectors, and a data transfer direction control code are produced for each one of the subunits of the cache block to be replaced. The directory memory is commonly used by a plurality fo magnetic disk units.

    Magnetic recording/reproduction apparatus
    36.
    发明公开
    Magnetic recording/reproduction apparatus 失效
    磁记录/复印装置

    公开(公告)号：EP0200192A3

    公开(公告)日：1987-08-12

    申请号：EP86105842

    申请日：1986-04-28

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

    Inventor： Kusunoki, Masahiro ,  Saito, Toshiya ,  Okamura, Hiroshi c/o Patent Division ,  Ohashi, Hiroshi c/o Patent Division

    IPC: G11B05/09 ,  G11B20/10

    CPC classification number: G11B20/10 ,  G11B5/02 ,  G11B5/09 ,  G11B19/02 ,  G11B27/24

    Abstract: A magnetic recording/reproduction apparatus of the invention has a magnetic head (10) for reading a vertical magnetically recorded signal, an inplane magnetic recorded signal or a magnetic recorded signal having both a vertical magnetic component and an inplane magnetic component and for supplying a reproduced signal, a first analog signal converting circuit (11) for converting the reproduced signal into an analog inplane reproduced signal when the reproduced signal is a vertical reproduced analog signal, a second analog signal converting circuit (12) for bypassing an inplane analog reproduced signal when the reproduced signal is the inplane reproduced analog signal, and a third analog signal converting circuit (13) for converting the reproduced signal into an inplane reproduced analog signal when the reproduced signal is the inplane reproduced analog signal. The circuits (11, 12, 13) are switched to operate selectively in accordance with the type of signals reproduced from a magnetic recording medium.

    Card-shaped electronic device
    37.
    发明公开
    Card-shaped electronic device 失效
    Kartenförmigeelektronische Vorrichtung

    公开(公告)号：EP0999492A3

    公开(公告)日：2000-06-14

    申请号：EP00101586.6

    申请日：1992-06-19

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA COMPUTER ENGINEERING CORPORATION

    Inventor： Kaji, Koichi ,  Inoue, Kanji

    IPC: G06F1/16 ,  H05K5/02

    CPC classification number: G06F1/1616 ,  G06F1/1637 ,  G06F1/1656 ,  G06F1/1679 ,  G06F1/1683 ,  G06F1/183

    Abstract: A rectangular flat box-like main body of the card-shaped electronic device can be inserted into and taken out of an electronic apparatus in a given insertion direction. The main body has a pair of lateral sides extending in the insertion direction. A pair of shield plates (154) are fixed to the main body to cover the upper and lower surfaces of the main body. Each shield plate is formed of a metal and includes a bent portion which is fitted on a lateral side of the main body and constitutes a conductive portion (160) for conducting the shield plates with the electronic apparatus when the main body is loaded in the electronic apparatus.

    Abstract translation: 卡形电子装置的矩形平盒状主体可以沿给定的插入方向插入电子装置中并从其中取出。 主体具有沿插入方向延伸的一对侧面。 一对屏蔽板（154）固定到主体以覆盖主体的上表面和下表面。 每个屏蔽板由金属形成，并且包括弯曲部分，该弯曲部分装配在主体的侧面上，并且当主体装载在电子装置中时构成用于将屏蔽板与电子设备导引的导电部分（160） 仪器。

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