Good Idea Peter to use compression...
Lucas Malor, you wanna mean that if we umount the partitions we will able to do this image ?
I'm not sure, explanation : I plug my kobo to my computer OS (here linux), it mounts partitions, I umount them and try to to a lsblk => I won't see a device called "mmcblk0" (that's normal because I don't see the card alone but a my kobo), so what I see is a device called sdc (for example).
I've try to do the back and restore on another card... only one partition (the biggest) is restore and my kobo don't want to boot => the 2 partitions of 256 Mo are not here !
An idea ???
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