| 摘要 |
PURPOSE:To eliminate the limit of the number of times of retry processing, by transferring an error log from an IO processor to a main storage device at difference timing from an end interruption to a main processor, and thus simplifying an end interruption program and also shortening processing time. CONSTITUTION:Transfer control over IO data between a main processor 402 and an IO device 109 is performed by an input and output control processor (IOP) 404. In this case, if a transient error occurs, the IO404 retries the transfer of the IO data. Every time the IO data transfer is retried through this multiprocessor system, error log information as retry informaion stored in the IOP 404 successively is transferred and stored in a specific area 300 of a main storage device 400 temporarily every time it attains to a specific value, and its interruption is caused at different timing from an end interruption to the main processor. Therefore, the main processor side simplifies an enn interruption program and also shortens processing overhead time, and the IOP side eliminates the limit of the number of times of retry processing. |
