Patent ID: 7305533

Claim:
A storage system including a plurality of storage units each equipped with a storage device and a controller for controlling storage of data into said storage device, the storage system comprising: said storage units each having a configuration of which configuration information including logical configuration information is held on a memory; and a migration control means for controlling configuration migration between a first storage unit having no logical partition function and a second storage unit having said logical partition function, wherein said migration control means comprises the functions of: carrying out processing for configuration migration, in accordance with a direction of migration, by performing a conversion process in which a configuration of said first storage unit to be a transfer-source is converted to a logical partition configuration of said second storage unit to be a transfer destination, based on the configuration information of said first storage unit, thereby updating a configuration of said second storage unit; and wherein said logical partition function includes at least one of a first logical partition function and a second logical partition function, said first logical partition function logically divides a cache memory to allow a host unit to access while occupying the logically-divided cache area which is assigned to said host unit, and said second logical partition function divides a storage device into a plurality of logical groups each having resources including a port, a cache memory, and a logical device so as to allow an administrator to change a configuration of the port, the cache memory, or the logical device in the logical group assigned to said administrator but not to change a configuration of the port, the cache memory, or the logical device in the logical group not assigned to said administrator.