What free software allows disc quality testing with Plextor drives?
Depends on the particular model/generation of Plextor drive.
Some of the oldest Plextor drives couldn’t scan.
Some newer Plextor drives made by LiteOn can scan using PlexUTILITIES.
Some Plextor drives can scan using Opti Drive Control (not free).
Some newer Plextor drives cannot be used for scanning AFAIK.
The Plextor drive is the PX-L890SA.
Since this is a LiteOn clone it should scan with no problems.
Is there a workaround to make scanning tools work with this drive?