Honey I blew up the hard drive The Network: An Electric Cooperative in the US Midwest with 50+ servers and 100+ workstations The Expectation: All servers have sufficient free hard disk space available at all times The Catch: The Application Activity and System Resource Monitoring feature of the EventTracker Windows Sensor was enabled. It notified “Low disk space” on Server37. Less than 2 GB was free. The Find: An Administrator “oops” moment. As part of a migration task, the same (large) dataset was copied twice, occupying double the expected disk space. Result – unexpected low disk. The Fix: Delete the duplicate files that were present on the server. The Lesson: Use a belt and suspenders to assure your pants don’t fall down.