The present invention provides a system of computers where one is active and processing data while the others standby. Data generated by the system is stored on at least two external, shared storage devices. The states of the computers are managed by a software system manager. This provides for a quick...http://www.google.de/patents/US6408399?utm_source=gb-gplus-sharePatent US6408399 - High reliability multiple processing and control system utilizing shared components
