Just a thought is it really likely that anything is locked, if you went to a dealer to purchase a map they would just take off the shelf and you would insert the new card?
This may not be the case for downloading VW/Skoda maps and trying to get them to work I appreciate.
This would be interesting if we could get this working somehow but does look like it might be something only a few might be able to do themselves but hopefully not the case.
Just wondering if there is a particular file or code in the stereo/media system itself that writes a code into the SD card when it is first installed into the car.
I have a Blackvue dash cam and every time you format the card to do a firmware update, the card is empty apart from the new firmware.
Once the SD card is installed, the device writes some files to the card including a user manual and original firmware version if firmware has not been stored manually on the SD card.
Just a thought
What was in the write-protected area? All zeros or seemingly random byte values?
I wonder if there are checksums for each of the mapping files (CRC, SHA, MD5 ?) stored in the slack space or elsewhere?
Does the 2nd copy of the FAT match the 1st exactly?
Do any files in the filesystem have the Hidden attribute?
As an aside, does the SD card need to remain in the slot permanently for the sat-nav to work or just to apply updates?
Looked random data in the 4mb partition, I couldn't read the SD card secure area as I only have usb readers.What was in the write-protected area? All zeros or seemingly random byte values?
I wonder if there are checksums for each of the mapping files (CRC, SHA, MD5 ?) stored in the slack space or elsewhere?
Does the 2nd copy of the FAT match the 1st exactly?
Do any files in the filesystem have the Hidden attribute?
As an aside, does the SD card need to remain in the slot permanently for the sat-nav to work or just to apply updates?
"Version Information"
5F0919866F 0036 ECE 2014
Just for an update. I have bought an Arduino Uno and a SD shield and I'm going to order some cheap Chinese SD cards and experiment with writing CID onto them. There's a guy on the Arduino forum who has had a partial success with that. I've also bought a Raspberry Pi which is currently used as a media center for the TV but can be also of help in cracking the SD card security.