You can unpresent a logical unit so that it is no longer visible to a VMware ESXi host or other host groups.
From the Actions list, select LUN, then select Unpresent LUN to unpresent a logical unit to an ESXi host.
Select the Storage System with the logical units to be unpresented.
Select the Logical Unit ID.
Select ESXi Cluster or Hosts.
Review the Summary window.