Patent ID: 8219770
Filing Date: 2012-07-10
Classification: G06F

Abstract:
1. A storage system comprising: a virtualization apparatus having a control unit, said control unit setting an actual volume for storing data sent from a host apparatus, formed in a storage area provided by a physical disk; and a virtual volume paired with the actual volume, for storing replicated data for the data; and an external storage apparatus having a logical volume that functions as an actual storage area for the virtual volume; and a tape associated with the logical volume, for storing the replicated data; wherein the external storage apparatus has a copy unit for copying the replicated data stored in the logical volume to the tape; wherein the external storage apparatus comprises a controller unit for controlling backup processing executed between a plurality of the logical volumes and a plurality of the tapes, wherein some or all of the plurality of the logical volumes forms a RAID group, some or all of the plurality of the tapes forms a tape group, and the RAID group and the tape group are associated with each other via a plurality of data transfer paths, and wherein the controller unit: