Using a SAN in conjunction with an ESX/ESXi host differs from traditional SAN usage in a variety of ways.

When you use SAN storage with ESX/ESXi, keep in mind the following considerations:

You cannot directly access the virtual machine operating system that uses the storage. With traditional tools, you can monitor only the VMware ESX/ESXi operating system. You use the vSphere Client to monitor virtual machines.

The HBA visible to the SAN administration tools is part of the ESX/ESXi system, not part of the virtual machine.

Your ESX/ESXi system performs multipathing for you.