A method and an apparatus for controlling a continuous data server, capable of dealing with a fault in the control device without affecting operations of the continuous data server, by using a plurality of control devices. One control devices is operated as a master control device for actually ...http://www.google.de/patents/US5809222?utm_source=gb-gplus-sharePatent US5809222 - Method and apparatus for controlling continuous data server using more than one central control devices 
