Patent ID: 8677093
Filing Date: 2014-03-18
Classification: G06F

Abstract:
1. A method of tier management of data, in a system which includes a host, a network, and a storage system coupled to the host via the network, the storage system having a memory, a plurality of virtual volumes, a plurality of logical volumes, and a plurality of physical media, the method comprising: performing a tier migration log information setup process which includes wherein for a specific area, the tier migration log information setup process provides destination tier and time information for the specific area during the updating; and performing a process using the tier migration log information to determine whether to migrate the specific area which includes storing tier destination information which includes virtual volume name, virtual volume address, capacity, number of access, access per capacity, current tier, and destination tier, that are organized in a descending order of access per capacity; wherein the tier destination information is created based on virtual volume information of the logical volumes and media type from logical volume information of the logical volumes, the virtual volume information including virtual volume name, virtual volume address, logical volume name, logical volume address, number of access, and access capacity.