Patent ID: 8352678
Filing Date: 2013-01-08
Classification: G06F

Abstract:
1. A storage system adapted to be coupled to a host computer, comprising: a plurality of disk drives; and a controller being configured to: manage a plurality of storage areas configured from the plurality of disk drives; further manage a first storage group and a second storage group, the first storage group including a first plurality of storage areas of the plurality of storage areas, and the second storage group including a second plurality of storage areas of the plurality of storage areas; and provide a first logical volume and a second logical volume to the host computer, the first plurality of storage areas in the first storage group being configured to be allocated to the first logical volume in accordance with a first write request to the first logical volume from the host computer and to store data of the first write request, the second plurality of storage areas in the second storage group being configured to be allocated to the second logical volume in accordance with a second write request to the second logical volume from the host computer and to store data of the second write request, wherein an attribute of the first plurality of storage areas of the first group is a first attribute and the first attribute is also assigned to the first storage group, an attribute of the second plurality of storage areas of the second group is a second attribute and the second attribute is also assigned to the second storage group, wherein the plurality of storage areas further comprises another plurality of storage areas and the controller further manages an attribute of each of the other plurality of storage areas, wherein the controller adds a third storage area of the other plurality of storage areas, whose attribute complies to the first attribute, of the plurality of storage areas to the first storage group if needed, wherein the controller adds a fourth storage area of the other plurality of storage areas, whose attribute complies to the second attribute, of the plurality of storage areas to the second storage group if needed.