Patent ID: 8402215
Filing Date: 2013-03-19
Classification: G06F

Abstract:
1. A storage system for processing a write access from a computer, comprising: a storage device comprising a storage area for storing write data associated with the write access; a controller for managing the storage area of the storage device as one or more pools, one or more RAID groups included in each of the one or more pools, a plurality of first logical areas are included in each of the one or more RAID groups, and a plurality of second logical areas configuring each of the plurality of first logical areas, wherein the controller provides a plurality of virtual volumes to the computer, causes one of the plurality of first logical areas included in the one or more RAID groups of at least one of the one or more pools to correspond with a destination virtual volume of the write access when the write access is received from the computer, and allocates one or more of the plurality of second logical areas, belonging to at least one of the plurality of first logical areas that was caused to correspond with the destination virtual volume of the write access, to an area into which data of the destination virtual volume is to be written; a first interface for coupling the computer; a second interface for coupling the storage device; and a control memory for storing: wherein the controller comprises: