What does it mean?
I'm having the same problem with my SAN Disc SD card.
I am getting the exact same message. trying to recover files from a RAW HDD. Somehow my drive became formatted as RAW and I am not able to open it. Nor will the operating system boot up. I now have my HDD in an external enclosure connected to another computer and still can not access it.
@Lea while i'm sure you feel desperate to have your problem solved, it's best to stay in your own thread as these problems can be complex and though they look similar from the outside, they rarely are. I'm sure someone in our volunteer userbase will cone along with some ideas to aid you.