Patent ID: 7849280

Claim:
A storage system comprising: plural information processing apparatuses, each of which copies data sent from a host computer to create archive data in accordance with redundancy sent from the host computer; and a storage apparatus including physical disks that store the archive data, and logical volumes configured of the physical disks, wherein the storage apparatus includes: a physical disk power state table that manages power state information that is information indicating whether or not a power state of each of the physical disks is “on”; and a logical volume table that manages the power state of each of the physical disks configuring each of the logical volumes at each of the information processing apparatuses, and wherein each of the information processing apparatuses includes: a volume management table that manages the power state of each of the physical disks configuring each of the logical volumes at each of the information processing apparatuses; an acquisition unit that acquires the power state information managed by the physical disk power state table; and a determination unit that determines an information processing apparatus targeted for reading or writing the archive data from among the information processing apparatuses based on the power state information acquired by the acquisition unit, wherein the determination is made by selecting an information processing apparatus at which the power state of the physical disk is “on” from among the information processing apparatuses in the volume management table.