Patent ID: 7185164

Claim:
A logical volume rearranging method used in a storage network environment including at least one storage subsystem and at least one server, said storage subsystem including means for transferring a logical volume in said storage subsystem to a parity group in said storage subsystem or to a parity group in a different storage subsystem and means for acquiring performance information of said logical volume and said storage subsystem, said method comprising the steps of: (a) collecting, from respective volume in each of said at least one server, mapping information of a storage subsystem connected with each volume, a parity group connected with each volume, and the logical volume connected with each volume, and collecting said performance information of respective parity groups and respective logical volumes; (b) setting a request I/O performance for said respective volumes in said server; (c) setting a rule for determining a logical volume rearranging destination; (d) when the logical volume to be rearranged is indicated, determining the parity group in said storage subsystem belonging to said logical volume as a rearranging destination in accordance with the information acquired by steps (a), (b) and (c); and (e) transferring said logical volume to the parity group determined by step (d).