A data storage system adapted to maintain redundant data storage sets at a destination location(s) is disclosed. The data storage system establishes a copy set comprising a source volume and a destination volume. Data written to a source volume is automatically copied to the destination volume. The data...http://www.google.com/patents/US20030188229?utm_source=gb-gplus-sharePatent US20030188229 - System and method for managing data logging memory in a storage area network
