A start time of recovery processing performed during a fall-back operation of the RAID can be flexibly controlled. A storage apparatus including an I/O processing unit that receives a data input/output request sent from an information processing device communicatively coupled to the I/O processing unit, and performs reading and writing of data from and to storage drives, includes: a priority storage unit that stores a priority set to each RAID group; a failure information storage unit that acquires and stores information on a failure occurred in the storage drives; a blockage processing unit that determines whether or not to block each of the storage drive based on the information on the failure, and blocks the storage drive that is determined to be blocked; a start time calculation unit that calculates a start time for starting recovery processing to delete a fall-back state of the RAID group to which the blocked storage drive belongs according to the priority set to the RAID group; and a recovery processing execution unit that starts the recovery processing at the start time.