Patent attributes
The management of computers connected with I/O switch devices is simplified. A computer system S includes one or several computers (server devices), one or several I/O devices, one or several I/O switch devices, and a management server 101. Management server 101 is provided with a storage part storing I/O configuration information and I/O switch management information; and a processing part comparing pieces of I/O configuration information and pieces of I/O switch management information, judging whether there might be a mismatch in the connection configuration between a computer and an I/O device and, in case it is judged that there is a mismatch, terminating the activation for a computer having the mismatched connection configuration, allocating a substitutable I/O device, and updating said I/O switch management information.