You can use the Edit Initiator Group dialog box to add initiators to an initiator group. An initiator gets access to a LUN when the initiator group that it belongs to is mapped to that LUN.
Steps
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Storage > LUNs.
3.
Click Initiators Groups.
4.
Select the initiator group to which you want to add initiators and click Edit.
5.
In the Edit Initiator Group dialog box, click Initiators.