I noticed the Unitrends appliance was beeping the other day. It was a constant beep, beep, beep... After rebooting the beeping went away.

A Unitrends appliance beeping continuously is a likely indication of fan failure in the unit. A failure is normally accompanied with a red indicator light on the front panel under the fan symbol. If this persists you should contact Unitrends Support Center at (888) 374-6124 to request a case to have the part replaced.