| 摘要 |
PURPOSE:To elevate reliability of a data, by logically detaching a fault storage device from a processor in a system, in case when a multiplexed storage device become faulty. CONSTITUTION:Access from processors 10, 20 is executed simultaneously to 2 storage devices 30, 40 through interface signal lines 10b, 10c, 20b and 20c. When an error signal is sent from a discriminating information sending-out circuit part 11, a storage device status controlling circuit 12 takes OR by its error signal and a main system storage device instruction signal sent from a system control monitoring device 50, and sends out a main system change instruction signal to an information switching circuit 14 together with a processor 20 of other system. Accordingly, an error is detected by the main system storage device 30, and the circuit 14 switches read-out information from the storage device 30 thereafter. |
