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    • 8. 发明授权
    • Buffered peripheral system and method for backing up and retrieving data
to and from backup memory device
    • 缓冲外设系统和备份和备份存储设备数据的方法
    • US5193154A
    • 1993-03-09
    • US783718
    • 1991-10-25
    • Hiroyuki KitajimaAkira YamamotoTakashi DoiMasafumi Nozawa
    • Hiroyuki KitajimaAkira YamamotoTakashi DoiMasafumi Nozawa
    • G06F13/00
    • G06F13/00Y10S707/99955
    • A buffered peripheral system comprises a backup memory and a primary control unit which has a buffer memory for temporarily storing a copy of the contents of a buffer memory which stores data to be written to a peripheral device and a control device for issuing a command necessary to write the block stored in the buffer memory device to the peripheral device. The primary control unit also includes a recording device for recording the block number corresponding to the block which was most recently written to the peripheral device. The blocks of data which have been written to the peripheral device is then deleted from the backup memory to make room for storing further blocks of data. The system further has a backup control unit substantially identical to the primary control unit. Only the primary control unit normally operates to control the writing to the peripheral device. Upon detection of the failure of the buffer memory in the primary control unit, the backup control unit completes the operation of writing to the peripheral device by retrieving the blocks of data to be written to the peripheral device from the backup memory device using the block number information.
    • 缓冲外设系统包括备用存储器和主控单元,该主控制单元具有缓冲存储器,用于临时存储要写入外围设备的数据的缓冲存储器的内容副本以及用于发出必要的命令的控制装置 将存储在缓冲存储器件中的块写入外围设备。 主控制单元还包括用于记录与最近写入外围设备的块相对应的块号的记录装置。 已经写入外围设备的数据块然后从备份存储器中删除,为存储更多的数据块腾出空间。 该系统还具有与主控制单元基本相同的备用控制单元。 只有主控制单元通常操作才能控制对外围设备的写入。 在检测到主控制单元中的缓冲存储器的故障时,备用控制单元通过使用块号从备用存储装置检索要写入外围设备的数据块来完成对外围装置的写入操作 信息。