Patent ID: 7984144

Claim:
A computer system including a host communicatable with a storage unit for providing logical volumes via a SAN (Storage Area Network) and with a management server unit via a LAN (Local Area Network), and for managing operating condition regarding the logical volumes and deletable logical volumes, wherein the management server unit comprises: a memory unit that stores operation-map information as a map associated with a volume ID as an identifier of a logical volume with a predetermined operating condition; a volume-information acquiring unit that acquires logical volume information on an operating condition of the logical volume from the storage unit to store the logical volume information in the memory unit; a volume-operating notifying unit that monitors the operating condition regarding the logical volume in accordance with the logical volume information to notify a changed operating condition as volume operating information; and a deletable-volume detecting unit that receives the volume operating information to update the operating condition in the operation map information in accordance with the volume operating information, and that detects the logical volume as being a deletable volume when the volume operating information indicating the predetermined operating condition is all set to a release state, among the notified volume operating information.