You should not dd to the partition, dd only to the device. ex: dd if=xxxxxx.img of=/dev/sdx bs=512k you should dd to /dev/sdx not /dev/sdx1. After you dd, check partitions using gparted or other tools. There should be 3 partitions. 1st part is vfat, 2nd is ext4, 3rd is swap. If you still get that error please let me know.