Patent ID: 6915403

Claim:
An information processing system comprising: a host computer; and a storage system connected to said host computer and including a plurality of disk devices and a controller coupled to said plurality of disk devices; wherein said host computer includes: means for storing mapping information between said plurality of disk devices and logical storage regions; means for determining a logical storage region and physical storage regions in disk devices corresponding to the determined logical storage region in which data to be transferred to another physical storage region is stored by referring to said mapping information; means for obtaining information indicating a destination physical storage region in a disk device to which data of the determined logical storage region is transferred; and means for instructing said storage system to transfer data of the determined logical storage region from the determined physical storage regions corresponding to the determined logical storage region to the destination physical storage region, said means for instructing issuing a transfer operation request for each of the determined physical storage regions corresponding to the determined logical storage region; and said storage system includes: means for transferring data from the determined physical storage regions to the destination physical storage region.