Patent ID: 7162600
Filing Date: 2007-01-09
Classification: G06F

Abstract:
1. A data migration method in a storage system comprising: receiving from a host system designation of a source volume, the source volume comprising data for which the data migration will be performed; receiving from a host system designation of a target volume, the target volume comprising one or more storage segments allocated from a disk device; and for each logical block address in the source volume, if the logical block address designates an area on the source volume that contains production data, then copying the production data to the target volume, the copying comprising: wherein the allocating and the associating are performed automatically without user involvement, and wherein the target volume comprises physical storage devices contained in an external storage system separate from the storage system, wherein the target volume is identified by the host system by a first identifier, wherein the target volume is identified in the external storage system by a second identifier the method further comprising consulting mapping information that maps the first identifier to the second identifier, wherein the copying uses the second identifier to access the target volume.