Virtual storage area network (VSAN)

A virtual storage area network (VSAN) is a logical partition in a physical storage area network (SAN).

VSANs enable traffic to be isolated within specific portions of a storage area network, so if a problem occurs in one logical partition, it can be handled with a minimum of disruption to the rest of the network.

The use of multiple, isolated VSANs can also make a storage system easier to configure and scale out. Subscribers can be added or relocated without needing to change the physical layout.

Depending on the vendor, a virtual SAN appliance might also be called a software-defined storage (SDS) appliance or, simply, a virtual storage appliance.

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