A fault tolerant database including one or more work stations (50-52) providing transaction data to be added to a database, including a primary network (100), a primary storage system (80) and a secondary storage system (90). A primary server (10) is coupled to the primary network (100) and receives...http://www.google.de/patents/US6564336?utm_source=gb-gplus-sharePatent US6564336 - Fault tolerant database for picture archiving and communication systems