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    • 8. 发明授权
    • Remote copy system with data integrity
    • 具有数据完整性的远程复制系统
    • US06701455B1
    • 2004-03-02
    • US09650217
    • 2000-08-29
    • Akira YamamotoKenji Yamagami
    • Akira YamamotoKenji Yamagami
    • G06F1100
    • G06F11/2064G06F11/2071Y10S707/99953
    • A storage system is provided which preserves data integrity, even when communications line, or similar, errors arise between the local disk system and the remote disk system. When there is no communication line error between the local disk system and the remote disk system, the local disk system sends a time stamp or the write order information with the write data to the remote disk system. This enables the remote disk system to make a copy with data integrity on the disk unit in the remote disk system itself. If there is a communication line error, the remote disk system allocates an empty disk unit and makes a copy with data integrity on the allocated disk unit after the communication line error between the local disk system and the remote disk system is detected.
    • 即使在本地磁盘系统和远程磁盘系统之间出现通信线路或类似的错误,也提供了保存数据完整性的存储系统。 当本地磁盘系统与远程磁盘系统之间没有通信线路错误时,本地磁盘系统将写入数据的时间戳或写入顺序信息发送到远程磁盘系统。 这使远程磁盘系统能够在远程磁盘系统本身的磁盘单元上复制数据。 如果存在通信线路错误,则在检测到本地磁盘系统和远程磁盘系统之间的通信线路错误之后,远程磁盘系统将分配空的磁盘单元,并在分配的磁盘单元上复制数据。
    • 10. 发明授权
    • Data transfer apparatus and method for data processing system
    • 数据传输装置及数据处理系统方法
    • US5592630A
    • 1997-01-07
    • US37022
    • 1993-03-25
    • Kenji YamagamiAkira YamamotoTakao Satoh
    • Kenji YamagamiAkira YamamotoTakao Satoh
    • G06F3/06G06F12/08G06F12/12G06F13/10G06F13/00G06F13/14
    • G06F12/0866
    • A data transfer system includes a controller having a cache memory and a transfer information judging unit for reading information stored in a recording medium and for obtaining a first transfer enabled time for storing the information of a track of the recording medium in the cache and a second transfer enabled time for storing the information of the recording medium in the cache memory. A buffer memory temporarily stores the information read from a request track and a pre-load track of the recording medium at every track, in which between the recording medium and the buffer memory and between the buffer memory and the cache there is a ratio of speed for transferring the information from the recording medium to the buffer memory and a speed for transferring the information from the buffer memory to the cache of 1:n (1.ltoreq.n). A buffer controller instructs such that the information of the request track is transferred from the buffer memory to the cache at the first transfer enabled time occurring when at least (1-1/n) of all of the information of the request track in said buffer memory is transferred from the recording medium to the buffer memory and instructs such that the information of the pre-load track is transferred from the buffer memory to the cache at the second transfer enabled time occurring when at least (1-1/n) of all of the information of the pre-load track is transferred from the recording medium to the buffer memory.
    • 数据传送系统包括具有高速缓冲存储器的控制器和用于读取存储在记录介质中的信息的传送信息判断单元,并且用于获得用于存储高速缓存中的记录介质的轨道的信息的第一传送使能时间和第二 用于将记录介质的信息存储在高速缓冲存储器中的启动时间。 缓冲存储器临时存储在记录介质和缓冲存储器之间以及缓冲存储器和高速缓存之间的每个轨道上从请求轨道和记录介质的预加载轨迹读取的信息存在速度比 用于将信息从记录介质传送到缓冲存储器,以及用于将信息从缓冲存储器传送到高速缓存1:n(1 n = n)的速度。 缓冲器控制器指示当在所述缓冲器中的请求轨道的所有信息的至少(1-1 / n)个时,发生请求轨道的信息在缓冲存储器中被传送到高速缓存器。 存储器从记录介质传送到缓冲存储器,并且指令使得预载磁道的信息在第二传输使能时间从缓冲存储器传送到高速缓存,当至少(1-1 / n)个 预载轨道的所有信息都从记录介质传送到缓冲存储器。