You haven't mentioned if you tried deleting the vol0 snapshots. Disabling will prevent further snaps, but if there are already existing then you can get rid of them.
cdot-01> snap delete -a vol0
Are you sure you want to delete all snapshots for volume vol0? y
Assuming you gained space after deleting snaps.
cdot-01> df -hg vol0
If it has?
Then, re-size it before rebooting.
cdot-01> vol size vol0 +1g
I Usually keep min 2g for vol0, always take a vmware snap before using it.
Let us know.