Here's something I didn't know and it cost me a lot of time. And it might help some folks that do a restore and then can't get the sys drive to boot. A floppy drive suddenly stopped working--didn't show up on My Computer anymore. So I disconnected it but forgot to tell the BIOS there was no floppy. When I tried to boot, "NO OS". What the . . .? So I whipped out ATI and did a restore. Tried to boot and still "NO OS". Apparently whenever you unplug any drives it disturbs the Boot Priority order in the BIOS. Once I figured that out, I reset the order to boot off the intended sys drive (a RAID btw) and everything was fine -- except that darned floppy, but those are easily replaced for $5. Meanwhile, guess I'll leave it plugged in until I get a replacement.