I have some CD‐ROMs with same origin which are difficult to copy.
When I insert them (one disc at once), I see one audio disc and one data disc in my file manager.
It is possible to access and copy data from each partition without issues, but when I use GNU tools on
/dev/sr0, I see I/O errors.
dd conv=noerror displays lot of I/O errors, but 0+0 (run for 400 seconds).
How do I backup them?