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?
@Sxan@piefed.zip nailed the main point. I’m making a legal backup copy of the content to store on DVD/Blu-ray discs in case something goes wrong or the disk get corrupted
It’s ok to break stupid laws. You won’t die
Creating a (usable) backup of a soon failing data carrier should be legal either way. Yeah, a lot of countries have stupid laws there, but as long as you don’t share the data on the internet, you should be fine.
Also to note: to legally watch a DVD, you require either Windows or MacOS, with a supported (proprietary) player software, in most jurisdictions. So, there, no legal DVD for Linux, laws are stupid. And instead of cracking it on each watch, better to just do it once.
DVDs have been around long enough that they are going out of style.
How many people have been convicted of backing up their dvds?
So how ate to blwgalkt going to watch it? Legal players well not play it.