Indeed, you’ll need to use our board name. I haven’t got a reComputer Industrial J4012 at hand but we did some tests on reComputer J3011 with JetPack 6.2.
Using the script l4t_backup_restore.sh is a viable solution. Please check the below screenshots:
As you can see the backup and restore process are successful and completed. The first SSD contain the orignal OS we modified(create backup), and we installed a seperate SSD for restore operations.
From your boot log it seems that something is wrong with filesystem, would you please try another SSD and format it as EXT4 beforehead? Usually going through all those process should be able to restore the image.