Storage system providing virtual volume and power saving control method of the storage system

摘要

A storage system includes a controller that specifies a first virtual volume (VVOL) and a first RAID group (RG) of an electrical power saving target. The controller judges whether there is a first real area based on the first RG that is allocated to a second VVOL. If there is, the controller moves data in the first real area to a free real area based on a second RG other than the first RG, and executes a moving processing in which a real area based on the second RG is allocated, as a substitute for the first real area, to a virtual area to which the first real area is allocated. The controller sets all of physical storage devices (PDEVs) that configure the first RG to be in an electrical power saving state if there is no real area based on the first RG that is allocated to the second VVOL.