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    • 1. 发明授权
    • Disk cache control unit
    • 磁盘缓存控制单元
    • US5369751A
    • 1994-11-29
    • US721928
    • 1991-06-21
    • Kosaku KambayashiKatsunori NakamuraTakao SatohYoshihiro AsakaTeruo Nagasawa
    • Kosaku KambayashiKatsunori NakamuraTakao SatohYoshihiro AsakaTeruo Nagasawa
    • G06F12/08G06F3/06G06F13/00
    • G06F12/0866
    • A disk cache control unit disposed between an upper-rank processor and a disk unit, comprising a cache memory for holding a copy of data stored in the disk unit, at least one first interface controller which checks, in response to an input/output command requesting data to be read from the upper-rank processor, whether or not the data requested by the command is stored in the cache memory, and requests a head positioning of the disk unit when the data is not stored in the cache memory, and a second interface controller which indicates head positioning to the disk unit in response to a head positioning request, notifies the completion of the head positioning to the first interface controller in response to a notice of the completion of the head positioning, and which reads data from the disk unit and stores the data in the cache memory when a data transfer request did not come in a specified time period set to read data from the disk unit without a rotational delay after a notice of the head positioning head been given to the first interface controller and the subsequent transfer of data from the second interface controller had been completed, and which gives a notice of storage of the data in the cache memory through memory means to the first interface controller, and in response to this storage notice, the first interface controller reads the data from the cache memory and transfers the data to the upper-rank processor.
    • 布置在高级处理器和盘单元之间的盘缓存控制单元,包括用于保存存储在盘单元中的数据的副本的高速缓存存储器,至少一个第一接口控制器,其响应于输入/输出命令 请求数据从高级处理器读取,无论命令所请求的数据是否存储在高速缓冲存储器中,并且当数据未存储在高速缓冲存储器中时请求磁盘单元的磁头定位, 第二接口控制器,其响应于头部定位请求指示到盘单元的头部定位,响应于头部定位的完成的通知,将头部定位的完成通知给第一接口控制器,并且从第 磁盘单元,并且当数据传输请求没有进入设置为在没有旋转延迟的情况下从盘单元读取数据的指定时间段内时,将数据存储在高速缓冲存储器中 头部定位头已经被提供给第一接口控制器,并且随后从第二接口控制器传送数据已经完成,并且通过存储器装置将数据存储在高速缓冲存储器中通知给第一接口控制器,并且在 响应于该存储通知,第一接口控制器从高速缓冲存储器读取数据并将数据传送到高级处理器。
    • 2. 发明授权
    • Disk cache unit having reduced waiting times for data transfer
    • 磁盘缓存单元具有减少数据传输的等待时间
    • US5475859A
    • 1995-12-12
    • US231916
    • 1994-04-25
    • Kosaku KamabayashiKatsunori NakamuraTakao SatohTeruo Nagasawa
    • Kosaku KamabayashiKatsunori NakamuraTakao SatohTeruo Nagasawa
    • G06F12/08G06F3/06G06F13/00
    • G06F12/0866
    • A disk cache control unit disposed between an upper-rank processor and a disk unit, comprising a cache memory for holding a copy of data stored in the disk unit, at least one first interface controller which checks, in response to an input/output command requesting data to be read from the upper-rank processor, whether or not the data requested by the command is stored in the cache memory, and requests a head positioning of the disk unit when the data is not stored in the cache memory, and a second interface controller which indicates head positioning to the disk unit in response to a head positioning request, notifies the completion of the head positioning to the first interface controller in response to a notice of the completion of the head positioning, and which reads data from the disk unit and stores the data in the cache memory when a data transfer request did not come in a specified time period set to read data from the disk unit without a rotational delay after a notice of the head positioning head been given to the first interface controller and the subsequent transfer of data from the second interface controller had been completed, and which gives a notice of storage of the data in the cache memory through memory means to the first interface controller, and in response to this storage notice, the first interface controller reads the data from the cache memory and transfers the data to the upper-rank processor.
    • 布置在高级处理器和盘单元之间的盘缓存控制单元,包括用于保存存储在盘单元中的数据的副本的高速缓存存储器,至少一个第一接口控制器,其响应于输入/输出命令 请求数据从高级处理器读取,无论命令所请求的数据是否存储在高速缓冲存储器中,并且当数据未存储在高速缓冲存储器中时请求磁盘单元的磁头定位, 第二接口控制器,其响应于头部定位请求指示到盘单元的头部定位,响应于头部定位的完成的通知,将头部定位的完成通知给第一接口控制器,并且从第 磁盘单元,并且当数据传输请求没有进入设置为在没有旋转延迟的情况下从盘单元读取数据的指定时间段内时,将数据存储在高速缓冲存储器中 头部定位头已经被提供给第一接口控制器,并且来自第二接口控制器的后续的数据传输已经完成,并且其通过存储器装置向第一接口控制器通知将数据存储在高速缓冲存储器中,并且在 响应于该存储通知,第一接口控制器从高速缓冲存储器读取数据并将数据传送到高级处理器。