Patent ID: 8209511
Filing Date: 2012-06-26
Classification: G06F

Abstract:
1. A storage management apparatus that moves data of a volume of a source array group to a destination array group, the source array group being one of a plurality of array groups each having a plurality of volumes provided in a storage apparatus, said storage management apparatus comprising: a central processing unit; a memory; a volume search unit configured to 1) calculate unused bandwidth, based on a usage rate and a maximum data processing capacity of each array group acquired from a disk processor that manages an input/output of data to and from the plurality of array groups, 2) calculate a bandwidth based on said unused bandwidths, said calculated bandwidth being a smaller capacity for data processing available between the source array group and the destination array group, and 3) select the volume, from the plurality of volumes of the source array group, for writing data therefrom, the selected volume having a write data transfer speed for write transmission that is smaller than the calculated bandwidth; and an operation management unit configured to move data of the selected volume to a volume of the destination array group, wherein for an array group the unused bandwidth is calculated by expression: where a is a usage rate, b is a maximum data processing capacity, and c is a bandwidth; and wherein the bandwidth between the source array group and the destination array group is calculated by the expression given below: where c