Patent ID: 7188166

Claim:
A storage system comprising: a plurality of host computers; a storage control device which is communicatively connected with the host computers via a first communication network, to receive a data input/output request transmitted from the host computers, and to read or write data from or to a storage device according to the data input/output request received; a management server, for managing the storage system, communicatively connected with the host computers and the storage control device; wherein each of the host computers has a processing status data transmitter for transmitting to the management server processing status data including data that indicate the status of processing related to the data input/output request being processed; wherein the management server has a message receiver for receiving the processing status data and transmitting to the storage control device a message that relates to performance adjustment of the storage control device for the host computers and is determined according to the processing status data received; wherein the storage control device has an adjustment executer for receiving the message and executing processing related to performance adjustment of the host computers according to the message received; wherein a first network address including a network address in the first communication network is provided to the host computers; wherein the first network address is set in the message received by the storage control device; wherein the storage control device stores the utilization rate of each logical device; wherein the storage control device has a logical unit manager for storing an association between the first network address, a logical unit that is a logical storage area provided to the host computers, and a logical device that is a logical storage area that is set using a storage area provided by the storage device; and wherein processing for changing the allocation of the storage devices for the host computers, executed by the adjustment executer, is performed by the logical unit manager changing the stored association in relation to the first network address contained in the message.