You can create a LUN on a storage subsystem attached to this server if it has enough storage space available and its Virtual ...

You can create a LUN on a storage subsystem attached to this server if it has enough storage space available and its Virtual Disk Service (VDS) hardware provider has been installed. This option will enable you to create a volume on the LUN and customize the reliability and performance characteristics of the new LUN (depending on the capabilities of the subsystem). For more information, see LUN Provisioning.