To view LUNs or the initiators to which each LUN is unmasked:
In the left pane of the ESI window, select the storage system.
For storage systems that support both block and file protocols, such as VNX and VNXe, select Block View from the Switch View list box in the center pane.
Click LUNs in the center pane.
Select the LUN from the list.
Click the plus (+) symbol to expand the LUN and view the initiators to which the LUN is unmasked.
Note: To customize the center pane, such as to remove or add columns for a custom view, right-click a column and select actions from the menu.