Patent ID: 8041791

Claim:
A computer system comprising one or several computers, one or several I/O devices allocated for each of said computers and for connecting with external devices, one or several I/O switch devices interposed between said computers and said I/O devices and switching the connections thereof, and a management server managing the connections between said computers and said I/O devices, wherein: said management server is provided with a storage part storing I/O configuration information defining the association between said computers and said I/O devices, and I/O switch management information managing information about said connected I/O devices for each of said I/O switches; and a processing part comparing pieces of said I/O configuration information and pieces of said I/O switch management information, and judging whether there is a mismatch in the connection configuration between said computers and said I/O devices, wherein said I/O configuration information has a plurality of combination patterns with said computers and one or several I/O devices connected with the same computers; said I/O switch management information has at least connection port numbers of said I/O switch devices, connecting I/O device names indicating the types of I/O devices to be connected, and identifiers of the I/O devices to be connected; and said processing part, in case it is judged that there is a mismatch in the configuration of the connection between said computer and said I/O device, designates said I/O device having the mismatched connection configuration from said I/O configuration information, and overwrites the identifier of said designated I/O device in said I/O switch management information with the identifier of said substitute I/O device.