I'm using XP SP2, the disk shows no errors, and is formatted (40GB Samsung SATA2). Jumper for SATA-150 mode is set correctly and the drive shows up fine on boot as well. The motherboard is an Aopen AK77-600GN with 2 SATA-150 ports off the VIA VT8237 southbridge. There are also 2 optical drives running off the IDE channels (a CD-RW and DVD-ROM). Why the **** isnt the hard drive being detected?