| 摘要 |
PROBLEM TO BE SOLVED: To avoid that regular disk processing is interrupted while specified processing is performed. SOLUTION: Disks 21 to 2N have two systems of loops 41A and 42B. When an FC-AL state monitoring part A131 detects the abnormality of the loop A41, a disk control part A71 requests the uncompleted disk processing to a disk control part B72. The disk control part B72 receives the request and performs the uncompleted disk processing by using the loop B42. The disk control part B72 also performs disk processing by a new instruction from the host. Then, the disk control part A71 diagnoses the loop A41.
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