| 摘要 |
PURPOSE:To secure the high reliability of output data to a peripheral device without duplexing an internal circuit and an internal bus by executing plural abnormality generation specifying means in stages and specifying a CPU generating abnormality. CONSTITUTION:When 'inconsistent error' information is continuously outputted from an I/O control processor 51 in a magnetic disk device 50 to arithmetic control modules (ACPs) 22, 32 in respective CPUs 20, 30 even if retrying processing is executed, a task being executed at present is abnormally ended as the 2nd error specifying means, retrying processing at a task level is instead executed. When 'inconsistent error' is continued in the retrying processing at the task level, the operation check of hardware is executed by a test program controlled by an operation system as the 3rd error specifying means, a fault generating position on the hardware is diagnosed and the CPU generating the abnormality can be specified. |
