Patent ID: 7702962

Claim:
A storage system comprising a storage device with a plurality of logical volumes, a host computer that is connected to the storage device and that has an access processing unit for accessing each of the logical volumes, and a management computer connected to the storage device and the host computer, the management computer comprising: a performance information collection unit for collecting performance information on the performance of respective elements on a communication path between the host computer and the storage device, the respective elements including a storage unit separate from the storage device, the storage unit being on the communication path; a faulty element detection unit for detecting a faulty element with an obstacle hindering performance improvement on the basis of the collected performance information on the respective elements; and a reviewing unit for reviewing measures based on a nature of the obstacle of the faulty element thus detected and selecting a measure that is effective against the obstacle, the measure being selected based on simulations performed by changing an I/O amount of each of the elements, the I/O amount being a result of the measure of a data usage element associated with the storage unit; wherein measures reviewed by the reviewing unit change at least one of the logical volumes or the access processing unit associated with the faulty element to another logical volume or another access processing unit.