There are a few places that this will pop up in Gravwell
There are a few places that disk space usage this will pop up in Gravwell. First is an alert in the top that would indicate an issue.
You can also check on disk space and health in the left menu bar under "Systems"
If you are having some trouble with full disks you may be interested in configuring data age-out. Here is a link to our docs on ageout:
Additionally, here is a KB article on the topic as well: