comments = ftw
about dumping a raw image:
a normal ODD reject the user data (PSN>0×2FFFF) beacuse the EDC check fails, If you are able to disable EDC check in the firmware, you are set.
the other way is to use mastering equipment.
maybe there is a DVD model from some vendor that let you setting someting (with debug cmds maybe) to disable temporary EDC or something, but anyway reading such image need that you reverse a firm. a stock ODD won’t do the work :(