Isnâ€™t this the same exact question you previously asked in your Forum posting of 16-06 2008 ->
Perchance did you check you BIOS settings as suggested by Forum Member KTL in the above referenced Forum posting? Have you ensured that you have your SATA port correctly configured for your Optiarc AD-7191S DVD Burner?
There are no special â€˜Driversâ€™ required for your Optiarc AD-7191S DVD Burner. The â€˜Driverâ€ is included and part of the your computerâ€™s Windows Operating System.
However there is a Firmware version 1.02 available for your AD-7191S DVD Burner ->