JP2960455B

PURPOSE:To appropriately perform a recovery processing corresponding to each write interruption cause by instructing correspondence to a disk controller (DKC) with a host CPU by receiving the notice of the write interruption cause even when interruption occurs in the case of performing memory write. CONSTITUTION:When the interruption of write due to the instaneous interruption of a power source or an error, etc., is detected in the case of the write on memories (14,13) are performed, the DKC 15 interrupts write processing, and informs the interruption cause of the write processing to a CPU 11. The central processing unit 11 instructs a processing content whether or not the write processing on an external memory device 12 should be performed, etc., to the DKC 15. Thereby, it is possible to perform appropriate processing corresponding to each interruption cause.