Users get Insufficient Disk Space alert notifications in the Deep Security console.
This alert was implemented in Deep Security as a requirement by Common Criteria. When the disk space is low on a machine set to delete one of the historical log files to continue logging events, this alert is thrown to the IDF server and will show up on the host status.
This is not meant to be used to monitor the disk space of the machine. Instead, it is meant to identify that the disk space is getting low and Deep Security IDF will begin having difficulties logging events.