Message: While in critically low free disk space state, current policy allowed no backups to be expired on ApplianceName appliance. The condition will remain, please add physical disk space to the appliance.

Cause: The onQ Appliance needs a certain amount of disk space to do its job. onQ relies on the ability to expire backups in an effort to “free up” disk space. Your retention policy forbids expirations.

Solution: Change your policy to allow for expirations. Go to Change Backup Retention Policy.