Disk array apparatus and method for controlling the same

Details Disk array apparatus and method for controlling the same Disk array apparatus and method for controlling the same

2011-05-10

2011-05-10

Baderman, Scott T (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

07941693

ABSTRACT:
A disk array apparatus capable of reducing a disk drive fault rate where a time-out failure has occurred. The disk array apparatus includes a plurality of disk drives, and a control unit for performing data input/output processing of the disk drives in response to a data input/output request from a host system. The control unit includes: a memory for storing control information for specifying a failure of at least one of the disk drives, and failure information of the faulty disk drive, a circuit for specifying, from the failure information, the disk drive in which a time-out failure has occurred, and issuing an instruction to retry a control command to the disk drive, and a circuit for outputting a control signal to the faulty disk drive in order to hard reset the disk drive if the disk drive does not recover from the failure.

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