Hi Noe Ortiz,
Welcome to communities.
Error message says
To make space available, delete old Snapshot copies, delete unneeded files, and/or expand the root volume's capacity.
After enough space is made available, reboot this controller. If needed, contact support personnel for assistance.
you can enter the node level and delete the snapshots for vol0
Here are the commands
Enter node level -- node run local
snap list vol0
snap delete -a vol0
Are you sure you want to delete all snapshots for volume vol0? y
snap list vol0 (to verify that old snapshots are deleted.)
in addition to this you can increase the vol0 size
Add disk to aggrs (aggr0)
increase the volume size using vol size +100m vol0
Repeat these on all nodes which are complaining root-vol-dangerlously low
After you are done this on all nodes reboot the nodes
Hope this helps
-Srinivas