I want to create a bit-by-bit backup of my DVD and a Blu-ray disc without removing its encryption. Is dd be the best method, and if so, what flags or settings should I use? Also, is comparing the SHA-256 hash of the generated ISO file with the hash of the original disc’s raw data (read from /dev/sr0) the best method for verifying the backup’s integrity?
Thanks for mentioning redumper. I’ll check it out. In your experience, after completing the disk dump with redumper, did you have a method to verify the copied data matched the original exactly?