I did not find an answer when I searched existing posts.
I use Alcohol 120% and a Pioneer DVD-RW DVR-116D SCSI CdRom Device. I also use top quality media (TY & Verbatim). With the original CD, I create either an .ISO or Alcohol’s .MDF format. Then I use Alcohol to burn the image to a blank DVD-R. Alcohol completes with no error message, but I have produced a coaster or two. I want some software that will detect coasters during the burn process. Comparing .ISOs is a tedious chore. Am I doing something wrong?? Vista SP2 (32 bit)