Sata drive not recognized

Hi,
Long & short. I rebooted the machine when windows locked up (opera/mail/excel all running at the sam e time). Upon restart all I got was BSD.

I’ve since updated the bios but the Sata drive isn’t seen. it’s the only hdd in use.

I’ve confirmed cables are good but don’t have a spare sata to try.

Any ideas?

ASUS P5GD1-VM
2x 1G Ram
Ultra 500W PS
XP