Thanks for the replies. Turns out the issue is that a root volume of 348.6g is already smaller than the minimum possible size of 350g for the A300. With ADP the root aggregates are just really small.
As SpindelNinja mentioned, leave it as is.
Some space needs to be free within the root vol. For example if you are doing ONTAP Updates the image files needs some space to be stored in.
kind regards
Andre
Thanks for the replies. Turns out the issue is that a root volume of 348.6g is already smaller than the minimum possible size of 350g for the A300. With ADP the root aggregates are just really small.