I had a second working reader which I could use....
So I started the reader in rescue mode and connected via Putty to create a backup:
#mount -o remount,rw /dev/mmcblk0p1 /initrd/mnt/sd
#for i in 5 6 7 8 9 10
do
dd if=/dev/mmcblk2p$i of=/initrd/mnt/sd/mmcblk2p$i.img
done
I started the initial boot-looped-reader with the SD with backup files and tried to restore them
#mount -o remount,rw /dev/mmcblk0p1 /initrd/mnt/sd
#for i in 5 6 7 8 10
do
dd if=/initrd/mnt/sd/mmcblk2p$i.img of=/dev/mmcblk2p$i
done
I was thought this might be the working option... but sadly no...