Patent ID: 8086881

Claim:
A system comprising: a second storage system for receiving a journal including one or more data element that is written in a primary logical volume provided in a first storage system, from said first storage system; and a management device for managing said second storage system, said second storage system including: a reception unit for receiving a command; a journal storage area; a plurality of storage devices; a plurality of logical volumes, including a secondary logical volume, formed in a storage space of said plurality of storage devices; a journal update unit for writing said journal received from said first storage system, into said journal storage area; a restore control unit for executing restoration processing, in which said one or more data element in said journal stored in said journal storage area is written into said secondary logical volume; and a storage device control unit for controlling said storage devices, and said management device including: a first acquisition unit for obtaining a journal usage rate indicating an extent of usage of said journal storage area by said journal; a second acquisition unit for obtaining a journal addition rate relating to a total amount of journals added to said journal storage area per unit time; and a command unit for transmitting to said second storage system, a power saving command for reducing the power consumption of a storage device relating to said secondary logical volume, in accordance with said journal usage rate and said journal addition rate satisfying predetermined conditions, wherein said reception unit receives said power saving command from said management device, said restore control unit suspends said restoration processing in response to reception of said power saving command, said storage device control unit executes power saving on said storage device relating to said secondary logical volume after said restoration processing is suspended; and, said journal storage area continues to operate in a non-power-saving mode, and said journal update unit continues writing said journal received from said first storage system, into said journal storage area, while said storage device control unit executes power saving on said storage device relating to said secondary logical volume.