Loop diagnosis system and method for disk array apparatuses
AssigneeNEC Corporation
InventorTomohiro Sakai
Life of this patent
Estimating the term…
Abstract
Disks 21 through 2N have two loops 41A and 42B and, if any abnormality in a loop A41 is detected by an FC-AL state monitoring unit A13, a disk control unit A71 requests a disk control unit B72 to 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 A71 diagnoses the loop A41.
Claims14
A loop diagnosis system for disk array apparatuses comprising:
- a recording unit having a plurality of loops for executing instructions from a host unit and a plurality of recording media;
- a loop monitoring unit for detecting any abnormality in any of said loops;
- and a loop controller for controlling said loops according to the result of monitoring by said loop monitoring unit.
A loop diagnosis method applicable to a loop diagnosis system for disk array apparatuses having a plurality of loops for executing instructions from a host unit and a plurality of recording media, including:
- a loop monitoring step to detect any abnormality in any of said loops;
- and
- a loop control step to control said loops according to the result of monitoring at said loop monitoring step.
Dependencies are inferred from the claim text.