Loop diagnosis system and method for disk array apparatuses

Details Loop diagnosis system and method for disk array apparatuses Loop diagnosis system and method for disk array apparatuses

2007-06-26

2007-06-26

Harper, Kevin C. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S242000, C714S002000

Reexamination Certificate

active

09883328

ABSTRACT:
Disks21through 2N have two loops41A and42B and, if any abnormality in a loop A41is detected by an FC-AL state monitoring unit A13,a disk control unit A71requests a disk control unit B72to perform uncompleted disk processing. The disk control unit B72,complying with this request, executes that uncompleted disk processing, using a loop B42.Also, disk processing at a new instruction from a host is also executed by the disk control unit B72.After that, the disk control unit A71diagnoses the loop A41.

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