Cloning a Pocketbook touch lux 3 ereader sd-card, incl. firmware, succesfully (i.e. writing CID)

I tried to order a new sd-card, including firmware, for my PB touch lux 3 device as suddenly stopped performing writing operations. However, the pocketbook support told me that the firmware is uniquely created per device, so that they could not send me an sd-card but I should send my device to them (and pay a lot for reparation). So I tried to clone the sd-card myself, but my device would not work with this exact clone of the sd-card did not work. After some more reseach by my brother, we found that some devices are protected by requiring the sd-card to have a certain unique cid.

Luckily Richard Burton did some research on hacking the cid of a sd-card which he described on his blog here, and in this video . I had no samsung evo plus lying around, so I first tried his script on some other sd-cards (Samsung evo 16GB, and another original Samsung 8GB sd-card that came with a Samsung galaxy 4), unfortunately the script did not work on any of these cards.

Fortunately my roommate had an 32GB evo plus card lying around and so I tried his script on this one, and with SUCCES (I also tested a newer 32GB evo plus card (see below), but here the script did NOT WORK, so you have to be lucky). After that I simply cloned the old sd-card using ddrescue on a linux box, using the internal card reader on my laptop and another external usb card reader (I made sure that I unmounted the cards first, then issued the command: sudo ddrescue -f /dev/sdc /dev/mmcblk0 clone_sd.log). One can lookup how to adapt this command for himself. With the right CID on this new card, my device finally worked again with this cloned card.

As I used my flatmates sd-card, I bought a new 32GB evo plus card for her. However before I handed it to her, I first tested if Richard Burton's script also worked on this card. However, I got a an error message that that the script was unable to "remove the lock"

I hope some people could find inspiration from this experience of mine...

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