Patent ID: 7533288

Claim:
A method of controlling a computer system including a plurality of servers, a plurality of networks connected to the plurality of servers, a plurality of external disk devices connected to the plurality of networks, and a management computer connected to the plurality of servers, the plurality of networks, and the plurality of external disk devices via a management network, each of the external disk devices including at least one disk for storing data, and the management computer including an interface connected to the management network, a first processor connected to the interface, and a first memory connected to the first processor, the method comprising: detecting, by the first processor, a fault which is occurred in any of the server, the network, and the external disk device; retrieving, by the first processor, an application stop server inaccessible to the used disk due to the fault among the plurality of servers; retrieving, by the first processor, a disk for storing the same contents as contents stored in the disk used by the retrieved application stop server among the plurality of disks, and the external disk device including the retrieved disk; retrieving, by the first processor, an application resuming server capable of accessing the retrieved external disk device via the network in which the fault is not occurred among the plurality of servers; and transmitting, by the first processor, an instruction to boot by using the retrieved disk to the retrieved application resuming server via the management network.