Patent ID: 7263574
Filing Date: 2007-08-28
Classification: G06F

Abstract:
1. A computer system comprising: a first storage device having a plurality of first logical volumes set logically, each of the first logical volumes being identified with a volume identifier and a medium identifier for identifying one of a plurality of mediums belonging to the volume identifier; a second storage device which stores a plurality of groups each composed of second logical volumes virtually set which are correlated with a selection condition under which respective groups are selected and further stores a correspondence between the second logical volumes and volume identifiers and medium identifiers of the first logical volumes; and an information processing device which selects one group according to the selection condition by execution of a program, specifies a second logical volume specified by the program based on the selected group, specifies a first logical volume corresponding to the specified second logical volume based on the correspondence stored in the second storage device, and accesses the specified first logical volume, corresponding to the specified second logical volume based on the volume identifier and the medium identifier of the first logical volume belonging to the selected group.