Once we have presented raw LUNs to an ESXi host, for it to be used as a storage container for virtual machine files, the LUN has to be formatted using VMFS. This is achieved by creating a VMFS datastore using the LUN.
Creating a VMFS datastore
Getting ready
You will need the NAA ID, LUN ID and the size of the desired LUN handy to ensure that you use the correct LUN to create the VMFS volume on. For the LUN discovery to work, the LUN should be presented correctly to the ESXi host at the storage array. If the ESXi host does not see the intended LUN, issue a rescan on the storage adapters to discover the presented LUN device.