This document is a guide to the iSCSI SAN configuration guide, which explains how to use ESX Server with storage area networks. The document provides detailed information on virtualization, network virtualization, and storage virtualization concepts, as well as topics such as multipathing and path failover, storage system types, and a comparison of targets and LUN representations. It also discusses the advantages of using ESX Server with SAN, viewing SAN configuration information, network configuration and authentication, sharing VMFS across ESX Servers, metadata updates, and volume display and rescanning.