Patent ID: 7444483

Claim:
A management apparatus for managing one or more storage systems having a plurality of storage devices that forms RAID groups and logical storage extents, the management apparatus comprising: a processing unit; a communication interface connected to the processing unit; and a user interface connected to the processing unit, wherein the processing unit collects first actual performance information and configuration information from the one or more storage systems via the communication interface, the first actual performance information contains an operation rate per a predetermined period of time for each storage device, the configuration information contains storage device power consumption specifications for each storage device, wherein the processing unit computes actual power consumption for each of the RAID groups based on the operation rate of the first actual performance information and the storage device power consumption specifications of the configuration information, wherein the processing unit collects second actual performance information from the one or more storage systems via the communication interface, the second actual performance information contains a number of I/O requests per the predetermined period of time for each of the logical storage extents and a data transfer amount per unit time for said each logical storage extent, and wherein the processing unit generates output signals to display the actual power consumption together with the second actual performance information on the user interface.