Patent ID: 8271444
Filing Date: 2012-09-18
Classification: G06F

Abstract:
1. A storage control device, comprising: one or more first storage devices having a plurality of segments, each segment comprising a physical storage area; a second storage device; a virtualization portion configured to allocate, in response to a first write request, one or more segments of the plurality of segments to a virtual volume that presents a volume capacity that is larger than a capacity of the one or more allocated segments; a backup control portion configured to use write management information for the virtual volume that indicates a first set of one or more segments of the plurality of segments that are allocated to the virtual volume and in which writing has occurred, the backup control portion being further configured to back up one or more data elements stored in the first set of one or more segments to the second storage device based on the write management information; and a restore control portion configured to reset allocation of each segment of the plurality of segments allocated to the virtual volume, allocate a second set of one or more segments of the plurality of segments that are not allocated to the virtual volume that correspond to the first set of one or more data segments such that a capacity of the second set of one or more segments is sufficient for storing the one or data elements backed up to the second storage device, and restore the one or data elements from the second storage device to the second set of data segments based on allocations of the second set of one or more segments to the virtual volume.