A first storage device control device stores, when a first data write/read request is received, correspondences between first logical units and second logical units referenced when determining whether or not storage regions identified by first logical units set in the request are storage regions of the...http://www.google.de/patents/US7184378?utm_source=gb-gplus-sharePatent US7184378 - Storage system and controlling method thereof, and device and recording medium in storage system
