- Virtual Storage Area Network (Virtual SAN). A
storage area technology originally developed by Cisco, which allows a SAN to
be logically sectioned allowing each section to be viewed and manipulated as
though it were a separate SAN.
A SAN is composed of a number of "SAN islands" (or fabrics), each of which is physically isolated by a switch or group of switches. This allows SANs to be expanded and changed with minimal disruption to the existing storage infrastructure. VSANs are a logical way of managing the collection of SAN islands, providing too future scalability.