So I have a Sata WD RaptorX150. It had been working fine for months when suddenly I got a disk read error during a defrag in win2k. Lost everything in the process of trying to recover it, luckily I made a backup a few weeks earlier, thought to upgrade for the hell of it and put in xp-pro. That's the setting, here's the issue. After the initial read error, the drive no longer detects in BIOS, it comes up as "undetected" but it boots fine without any errors and I've been using it for 2 weeks now. Every now and then I get a "The driver detected a controller error on \Device\Harddisk0\D" in my event book, but always when it's idling. So the question. Why is it not showing in bios but boots fine, what is the error about and am I doomed? Specs are: AMD64 3800+ 1 gig ram MSI K8T Neo2 motherboard AGP 7800 GS video Creative X-Fi Sound (go crackling pops!) Win2k and Winxp pro. Every thing's drivers are updated like they should be.