A Storage Area Network (SAN) is a network designed to attach computer storage devices such as disk array controllers and tape libraries to servers. As of 2006, SANs are most commonly found in enterprise storage. A SAN allows a machine to connect to remote targets such as disks and tape drives on a network for block level I/O.
Storage Area Network (SAN) is a specialized, high-speed network that provides block-level network access to storage. SANs are typically composed of hosts, switches, storage elements, and storage devices that are interconnected using a variety of technologies, topologies, and protocols.