I’m looking for software that could scan opened (or mounted in a virtual drive) images for unreadable / erroneous sectors. CDMage has this feature, but it doesn’t work with DVD images. I don’t really need any fixing capabilities, only detection. I checked IsoBuster and it does have a “surface scan” and works with any image mounted (I tried DT). Does it use the same method as CDMage? If you know of better alternatives, let me know.