Patent ID: 7747800
Filing Date: 2010-06-29
Classification: G06F,Y02D

Abstract:
1. A storage system which receives an I/O command sent from a computer, and which is coupled to a management device, the storage system comprising: a plurality of physical storage devices which form a plurality of Redundant Array of Inexpensive Disks (RAID) groups, the RAID groups in which a plurality of logical units are provided; a power-saving indication receiving section which receives from the management device a power-saving indication specifying a RAID group in the plurality of RAID groups; a logical unit type identifying section identifying the logical unit type of a logical unit which is provided in the specified RAID group; and a power-saving controller which determines whether or not the identified logical unit type is a prescribed logical unit type, and if this identified logical unit type is the prescribed logical unit type, performs power-saving to one or more physical storage devices corresponding to the specified RAID group, and if the identified logical unit type is different from the prescribed logical unit type, maintains the one or more physical storage devices corresponding to the specified RAID group at spin-up status.