A connection switching apparatus and system are disclosed that provide an inexpensive, high-speed and large-capacity file system having functional extensibility and enabling redundant data writing. A connection switching apparatus is provided on the side of a telecommunication circuit of a plurality...http://www.google.de/patents/US7260612?utm_source=gb-gplus-sharePatent US7260612 - Switching system duplicating file operation command according to quantity of file servers and sending writing and reading commands according to a switching order
