Patent ID: 8694727

Claim:
A first storage control apparatus, which is communicatably coupled via a communication path to at least one second storage control apparatus, the first storage control apparatus comprising: a pool, which is divided into multiple different tiers, and which has at least one pool volume disposed in each of the tiers; a virtual volume, which is created based on the pool; a command processing part configured to process a command with respect to the virtual volume; an information acquisition part configured to acquire prescribed performance information related to performance of the pool volume; and a tier control part configured to decide which of the tiers the pool volume is associated with, based on the acquired prescribed performance information, wherein at least one pool volume of the respective pool volumes is associated with a logical volume in the at least one second storage control apparatus via the communication path, the command processing part is configured to convert, from among commands to the virtual volume, a command corresponding to a logical volume in the at least one second storage control apparatus to a command for use in the at least one second storage control apparatus, and to send this converted command to the at least one second storage control apparatus, and the information acquisition part is configured to acquire, as the prescribed performance information, information related to the logical volume in the at least one second storage control apparatus and information related to the performance of the at least one second storage control apparatus.