Redundant disc computer having targeted data broadcast
    1.
    发明授权
    Redundant disc computer having targeted data broadcast 失效
    具有目标数据广播的冗余光盘计算机

    公开(公告)号:US5720027A

    公开(公告)日:1998-02-17

    申请号:US652636

    申请日:1996-05-21

    摘要: A redundant disk computer system providing targeted data broadcast on the data bus to a plurality of devices on the data bus, such as computer central memory and a plurality of storage media disks (parity and data) under control of a real time operating system. Each of the plural disk storage media is each connected to the data bus with a corresponding enhanced disk adapted including a demand page memory of size sufficient to include a selected block of data and arranged to provide access to a selected portion of that data. The redundant array computer operating system provides the control and selected designation of the disk adapters as targeted receivers to read data "broadcast" over the data bus, providing simultaneous transfer of data over the data bus. Each enhanced disk adapter further includes exclusive-OR logic thereon to provide direct calculation of parity from the newly received data and a subsequently received old data on a single subsequent data bus cycle. Thus, according to the present invention, the number of data bus data transfers is reduced and significant improvements in system performance is provided.

    摘要翻译: 冗余磁盘计算机系统,其在数据总线上向数据总线上的多个设备提供目标数据广播,诸如在实时操作系统的控制下的计算机中央存储器和多个存储介质盘(奇偶校验和数据)。 多个磁盘存储介质中的每一个各自连接到数据总线,其中相应的增强磁盘适于包括足以包括所选数据块的大小的请求页面存储器,并且被布置成提供对该数据的所选部分的访问。 冗余阵列计算机操作系统将磁盘适配器的控制和选择指定作为目标接收机,通过数据总线读取数据“广播”,从而提供数据总线上的数据的同时传输。 每个增强型磁盘适配器还包括其上的异或逻辑,以在单个后续数据总线周期上提供从新接收到的数据和随后接收的旧数据的直接计算奇偶校验。 因此,根据本发明,减少数据总线数据传送的数量,并提供系统性能的显着改善。