Storage Area Network
1. A network whose primary purpose is the transfer of data between computer
systems and storage elements and among
storage elements. A
SAN consists of a communication infrastructure, which provides physical
connections, and a management layer, which organizes the connections, storage
elements, and computer systems so that data transfer is secure and robust. The
term SAN is usually (but not necessarily) identified with block I/O services
rather than file access services. 2. A storage system
consisting of storage elements,
storage devices, computer systems, and/or
appliances, plus all
control software, communicating over a network.
See also: iSCSI SAN, fabric, FC SAN
Note: The definition does not identify the term SAN with Fibre Channel technology. It is encouraged that when the term SAN is used in connection with Fibre Channel technology, to use a qualified phrase such as "Fibre Channel SAN.". According to this definition an Ethernet-based network whose primary purpose is to provide access to storage elements would be considered a SAN. SANs are sometimes also used for system interconnection in clusters.