The reason I asked so many questions is that I want to make sure I have a working combination of the burner, firmware, and media. So I will take a note of this DH-20A4P (firmware 9P59), on RiData 16X DVD+R (burned at 8X) as a working solution?[/QUOTE]
I use the enhanced firmware 9P59 from the link above and the Smartburn utility for Lite-On drives. It burns RiData and most other media pretty well.
Most of the quality scans I have done have been from Nero Speed Quick Scan, not the regular scan.