You can use ESX/ESXi in conjunction with the Fibre Channel storage area network (SAN), a specialized high-speed network that uses the Fibre Channel (FC) protocol to transmit data between your computer systems and high-performance storage subsystems. SANs allow hosts to share storage, provide extra storage for consolidation, improve reliability, and help with disaster recovery.

To use ESX/ESXi effectively with the SAN, you must have a working knowledge of ESX/ESXi systems and SAN concepts.