Patent ID: 8112596

Claim:
A management computer coupling with a storage system through a network comprising: a processing unit; an output interface coupling with the processing unit; and a storage interface coupling with the processing unit; wherein the processing unit is configured to collect information from the storage system through the storage interface, the storage system comprising a plurality of redundant array of independent disk (RAID) groups, the information comprising an I/O frequency of input and output requests by a host computer and a data transfer amount per unit of time for each logical storage extent for respective ones of the RAID groups, and further comprising magnetic memory apparatus operation information comprising an operation rate per unit of time for each magnetic memory apparatus; wherein the processing unit is configured to calculate power consumption based at least in part on the information and to send a first command to display the power consumption and a number of the input and output requests together in a same screen through an output interface, wherein the processing unit is configured to initiate migration, in response to a control input, of one of the storage extents in one of the RAID groups in order to control power consumption for that RAID group.