Edit LUNs with System Manager - ONTAP 9.7 and earlier
You can use the LUN properties dialog box in ONTAP System Manager classic (available in ONTAP 9.7 and earlier) to change the name, description, size, space reservation setting, or the mapped initiator hosts of a LUN.
When you resize a LUN, you have to perform the steps on the host side that are recommended for the host type and the application that is using the LUN.
Click Storage > LUNs.
In the LUN Management tab, select the LUN that you want to edit from the list of LUNs, and click Edit.
Make the required changes.
Click Save and Close.