A method for migrating a block of data within a storage system includes migrating first data stored in a first storage volume of a first storage subsystem to a second storage volume in a second storage subsystem. The first data is a block of data that is presented to a host so that the first data may...http://www.google.com/patents/US7039662?utm_source=gb-gplus-sharePatent US7039662 - Method and apparatus of media management on disk-subsystem
Method and apparatus of media management on disk-subsystem
