Patent ID: 7146464
Filing Date: 2006-12-05
Classification: G06F

Abstract:
1. A storage system comprising; a control unit; and a plurality of disk devices including a plurality of first type disk devices accessed via first type interfaces and a plurality of second type disk devices accessed via second type interfaces; wherein the control unit detects interface types related to the plurality of disk devices so that a plurality of RAID groups, which includes a first type RAID group configured by plural first type disk devices and a second type RAID group configured by plural second type disk devices, are configured based on the detected interface types, and a plurality of logical units, which includes a first type logical unit configured in the first type RAID group and a second type logical unit configured in the second type RAID group, are configured, wherein the control unit manages a relation between the first type logical unit and a first type interface and between the second type logical unit and a second type interface, and the second type logical unit is selected for storing backup data for the first type logical unit based on the relation managed by the control unit, and wherein the control unit manages a backup operation from the first type logical unit to the second type logical unit.