Data Storage - Storage area network (SAN)

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A storage area network (SAN) is an architecture to attach remote computer storage devices (such as disk arrays, tape libraries, and optical jukeboxes) to servers in such a way that the devices appear as locally attached to the operating system.

A SAN typically is its own network of storage devices that are generally not accessible through the regular network by regular devices.

A SAN alone does not provide the “file” abstraction, only block-level operations. However, file systems built on top of SANs do provide this abstraction, and are known as SAN filesystems or shared disk file systems.

Documentation / Reference

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