I have 2 hard drives both formated to NTFS, 80 GB ATA which has system partition on it. And SATA 320 GB. Every time i install windows the message [ not xp compatible partition create....... u know the rest. But what i dont understand, is when i remove the SATA hardrive the installation works just fine. Another thing, now windows is installed just fine, i installed windows on my 80 hard while the SATA one is unplugged then i replugged it after the installation is finish. but when i restart the windows wont start the screen just stays in DOS. But when i unplug the SATA 320 GB hardrive it mysteriously starts again with no problem! My main problem: i want to understand what is wrong with the 320 GB SATA hardrive. What do i have to do so that the two hardrive synchronize together without any problems.