Patent ID: 8903982

Claim:
A computer system, comprising: a storage apparatus including a plurality of storage devices and including a volume as a storage area to be used by a host computer; and a management server coupled to the storage apparatus and the host computer via a network and for managing performance information of the storage apparatus and the host computer; wherein the management server comprises: an acquisition unit which repeatedly acquires performance information of the storage apparatus and the host computer; and a comparison unit which compares a performance value of first components in the storage apparatus and a performance value of second components in a connection relationship with the first components; and wherein, to acquire configuration information about the storage apparatus, the acquisition unit determines that an unknown component has been added in the storage apparatus when the difference in the performance values compared with the comparison unit exceeds a predetermined threshold, wherein the comparison unit which acquires the current performance value of each RAID group of the storage apparatus, detects a list of volumes belonging to each RAID group and totals the current IOPS values of the volumes, and confirms whether a value obtained by dividing the totaled IOPS value by the IOPS value of the RAID group exceeds a predetermined threshold.