Patent ID: 8566548
Filing Date: 2013-10-22
Classification: G06F

Abstract:
1. A data migration method for migrating data stored in a storage area, from among a plurality of storage areas provided in a storage apparatus, to another storage area, comprising the steps of: specifying a first storage area serving as a data writing and reading subject in relation to a host computer, and a second storage area in which a copy of data stored in said first storage area is stored, and determining a performance of said first storage area and a performance of said second storage area, and when said performance of said second storage area is lower than said performance of said first storage area, specifying a storage area having a higher or equal performance than said performance of said first storage area from said storage areas provided in said storage apparatus, migrating data stored in said second storage area to said specified storage area, and storing a copy of said data stored in said first storage area in said specified storage area serving as a new second storage area.