Patent ID: 8423818
Filing Date: 2013-04-16
Classification: G06F

Abstract:
1. A disk array apparatus comprising: 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, wherein said control unit includes: a memory for storing control information for identifying a failure of at least one of the disk drives, and failure information of a faulty disk drive, a first circuit for identifying, from the failure information, the faulty disk drive that is provisionally categorized as not having recovered from a suspected failure, and issuing a retry instruction to retry a control command to the suspected faulty disk drive, and a second circuit for outputting a control signal to the suspected faulty disk drive in order to hard-reset the suspected faulty disk drive if the suspected faulty disk drive does not recover from the suspected failure by normally executing the control command which was retried according to the retry instruction, wherein the hard-reset initializes a chip that includes an electronic circuit of the suspected faulty disk drive, wherein when the control unit detects a faulty disk drive, the control unit sends a retry command to the faulty disk drive, and wherein if the faulty disk drive does not execute the retry command, the control unit sends a hard reset control signal to the faulty disk drive and then issues a spin-up command to determine whether the faulty disk drive is recovered.