The invention relates among other things to a method for operating a secondary computer (22), in which a memory unit in an originating computer (12) initially stores a first data volume (112) and a second data volume (114). During transmission of copies of the data volumes (112, 114), change reports...http://www.google.co.uk/patents/US7171395?utm_source=gb-gplus-sharePatent US7171395 - Method for operating a secondary computer, switching devices for flawless operation and corresponding programme
