ESX supports Fibre Channel adapters, which allow a host to connect to a SAN and see storage devices on the SAN.

You must install Fibre Channel (FC) adapters before the host can access FC storage devices.

Fibre Channel Storage depicts virtual machines using Fibre Channel storage.

Fibre Channel Storage
A host connects to SAN fabric using a Fibre Channel adapter.

In this configuration, an ESX host connects to SAN fabric, which consists of Fibre Channel switches and storage arrays, using a Fibre Channel adapter. LUNs from a storage array become available to the host. You can access the LUNs and create a datastore for your storage needs. The datastore uses the VMFS format.

For specific information on setting up the FC SAN fabric and storage arrays to work with ESX, see the Fibre Channel SAN Configuration Guide.