I'm not exactly sure what happened... Sunday around 2 PM this server rebooted... and froze. It wouldn't reboot properly at all! So Monday I took it in to work with me to work on during slow periods. Still couldn't get it to boot properly. So last night I rebuilt the server. New drives, put into a software RAID 1 mirror. I still need to promote it to a domain controller and get my email up (which may be pointless soon, but more on that tonight), but most of the server is running correctly again.