Patent ID: 7451346
Filing Date: 2008-11-11
Classification: G06F

Abstract:
1. A storage control device comprising a plurality of storage devices including at least one spare storage device, comprising: an error condition detection section that detects the error condition of each of the storage devices; an input/output request control section that, when an error is detected by the error condition detection section, controls the input/output request from a host computer with respect to the storage device in which the error has been detected; and a recovery control section that, when the error condition detected by the error condition detection section exceeds a preset threshold, recovers the stored content of a recovery-target storage device, in which the error has been detected, in the spare storage device, wherein the recovery control section comprises: a first copy mode that reads data from the recovery-target storage device and copies the data thus read to the spare storage device; and a second copy mode that restores data stored in the recovery-target storage device on the basis of data read from other storage devices belonging to the same RAID group as the recovery-target storage device and copies the restored data to the spare storage device, and wherein when shifting from the first copy mode to the second copy mode, the recovery control section starts the second copy mode from the copy interrupt position of the first copy mode.