| 摘要 |
PURPOSE:To avoid the hindrance of file access to the processing afterwards, by shunting the file in large memory unit in advance and enabling to restore immediately after the restoration of system down. CONSTITUTION:The content of the file 14 of large memory unit 1 is shunted to the auxiliary memory unit 3 with the shunt means 23 against failure. The display contol means 21 sets the diaplay under write-in to the display region 13 in the storage region 12 of the information relating to the file every write-in or renewal request. With the state set for this display, if system down is taken place, the display and retrieval means 22 retrieves the managing region 11 during the large memory unit 1 in case of restoration, seeks out the file having the display of write-in and outputs the message of the necessity of restoring the file. According to this message, when the operator prepares the auxiliary memory unit 3, th restoring means 24 once deletes the file having the write-in display and restores the file shunted on the auxiliary memory unit 3 newly. |
