If they're not copy-protected, try gddrescue; it logs what it's read, and it can resume. Try another drive if you can. And, I know it sounds odd, you can rub yo

If they're not copy-protected, try gddrescue; it logs what it's read, and it can resume. Try another drive if you can. And, I know it sounds odd, you can rub your finger against the side of your nose and then across any scratches on the shiny side.