Patent ID: 6904469

Claim:
A computer system comprising a plurality of computers, a storage control apparatus connected with the plurality of computers on a channel path and for performing input and output through the channel path, and a storage device under the control of the storage control apparatus for storing input/output data of the computers; wherein said storage control apparatus classifies the plurality of channel ports of the storage control apparatus to which the channel path is connected into priority channel ports and non-priority channel ports, so that channel ports defined as priority channel ports carry out I/O processing without suppressing the processing of I/O from the computers; and channel ports defined as non-priority channel ports are given a target value in I/O process units and carry out processing while performing feedback control so that I/O processing from the computers approaches the I/O process units; and wherein the storage control apparatus controls the level of the influence of the non-priority channel port I/O processing on priority channel port I/O processing.