There is disclosed a high speed switching method for a disk image delivery system fail-over. A management server sends a disk image of an active server in advance to a standby server. When receiving a report that the active server has failed, the management server judges whether or not it is possible...http://www.google.de/patents/US7890792?utm_source=gb-gplus-sharePatent US7890792 - Server switching method and server system equipped therewith
