Power control method for computer system

A computer system including:

• an input/output switch coupled to a plurality of input/output devices;
• a server which is coupled to the input/output switch, and which uses the plurality of input/output devices;
• and a management computer coupled to the input/output switch and the server,
• wherein the management computer comprises:
• an interface coupled to the input/output switch and the server;
• a processor coupled to the interface;
• and a memory coupled to the processor,
• wherein the management computer is configured to manage pieces of management information including a port of the input/output switch coupled to the each of the plurality of input/output devices, an association of a device coupled to the each of the plurality of input/output devices, and a usage ratio of the each of the plurality of input/output devices,
• select at least one of the input/output device of which the usage ratio is smaller than a predetermined threshold according to the pieces of management information, and
• set another input/output device coupled to the input/output switch to process a request for the selected input/output device.

A management computer coupled to an input/output switch coupled to a plurality of input/output devices and a server which is coupled to the input/output switch, and which uses the plurality of input/output devices, comprising:

• an interface coupled to the input/output switch and the server;
• a processor coupled to the interface;
• and a memory coupled to the processor,
• wherein the processor is configured to:
• manage pieces of management information including a port of the input/output switch coupled to the each of the plurality of input/output devices, an association of a device coupled to the each of the plurality of input/output devices, and a usage ratio of the each of the plurality of input/output devices;
• select at least one of the input/output devices of which the usage ratio is smaller than a predetermined threshold according to the pieces of management information;
• and
• set another input/output device coupled to the input/output switch to process a request for the selected input/output device.