Problem is a little bit difficult.My Optiarc 7200A worked fine and nero quality tests were always about 95%-97%.
I have windows XP,and optiarc 7200a with 1.09 firmware.
I flashed the drive few days after I bought it.No problems with scan,until now.
Tricky is that I unckecked DMA mode in win (it’s a shame,I know).
I tried to revert everything,but with no sucess.DMA is on “let bios select transfer mode”.
I tried to uninstall driver for drive,but no use.
Discs that I burned was MCC 004.
I restored my backed up copy of win XP.Maybe to reinstall XP completely ?