A storage control and switch unit for transferring data between a host computer and first, second, third and fourth storage media. A first storage controller has an operative serial ATA connection with each of the first and second storage media and an inoperative serial ATA connection to each of the...http://www.google.de/patents/US6915381?utm_source=gb-gplus-sharePatent US6915381 - System and method for transferring data from a secondary storage controller to a storage media after failure of a primary storage controller
