It appears my Antec EarthWatts power supply is failing. It took a few days to diagnose the problem as the server as having some random reboots and then problems coming back up after the reboot. There was nothing in the event log, so I swapped out some drive cables and hard drives thinking it was a drive issue. It seemed stable for a day or two but then I got another random reboot. I took the power supply out of my kid's PC and the server's been up & running since Tuesday. I've got a couple 250W 80Plus power supplies coming this week (one for the HA server and one for the DVR) so my kid can have his PC back.