Patent ID: 8352766

Claim:
A system comprising: at least two secondary storage systems for each receiving from a first storage system, a journal including one or more data element that is written in a primary logical volume provided in the first storage system; and a management device for managing said secondary storage system, each secondary storage system of said at least two secondary storage systems 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, for said each secondary storage system of said at least two secondary storage systems, a journal usage rate indicating an extent of usage of said journal storage area by said journal; a second acquisition unit for obtaining, for said each secondary storage system of said at least two secondary storage systems, 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 a target secondary storage system of said at least two secondary storage systems, a power saving command for reducing the power consumption of a storage device relating to said target secondary logical volume, in accordance with said journal usage rate and said journal addition rate of said target secondary storage system, satisfying predetermined conditions, wherein said reception unit of said target secondary system receives said power saving command from said management device, said restore control unit of said target secondary system suspends said restoration processing in response to reception of said power saving command, said storage device control unit of said target secondary system executes power saving on said storage device relating to said secondary logical volume of said target secondary system, after said restoration processing is suspended; and, said journal storage area of said target secondary system continues to operate in a non-power-saving mode, and said journal update unit of said target secondary system continues writing said journal received from said first storage system, into said journal storage area of said target secondary system, while said storage device control unit of said target secondary system executes power saving on said storage device relating to said secondary logical volume.