Remember that ASUS P3V4X I was complaining about? Well it seem that it really is the IDE drivers. Or at least, I have more information that such is the case. We flashed the BIOS, which was a trivial update. But when I did SP4 I did NOT update the drivers. So far, things seem to have worked. The server has survived a pair of reboots, and has survived a simulated backup (thank you SMSTEST). We'll see if it survives the night.