In one embodiment of the invention, a disk storage accessing system for
enabling a plurality of computers to share and access a plurality of disk
storages comprises a plurality of computers that refer to the disk
storages. Each of the computers includes a counting module for counting a
frequency of accesses to each of the disk storages, and a module for
receiving an access path change command to change access paths for the
computer to access a different disk storage according to the command. The
system further comprises an instructing module for collecting and
totaling a frequency of accesses to each disk storage, and for
instructing the receiving module of a computer that accesses the copy
source disk storage after receiving a report of copy completion, to
change access paths so as to access a target disk storage instead of the
copy source disk storage.