Merge pull request #67 from Itxaka/gpt

Signed-off-by: Itxaka <itxaka.garcia@spectrocloud.com>

tools-image/build-arm-image.sh

@@ -360,7 +360,8 @@ sgdisk -n 3:0:+$(( ${recovery_size} + ${oem_size} ))M -c 3:lvm -t 3:8e00 ${outpu
 fi
 sgdisk -n 4:0:+64M -c 4:persistent -t 4:8300 ${output_image}
 
-sgdisk -m 1:2:3:4 ${output_image}
+# Make the disk GPT
+sgdisk -g ${output_image}
 
 if [ "$model" == "rpi64" ]; then 
     sfdisk --part-type ${output_image} 1 c
@@ -473,7 +474,7 @@ sync
 sleep 5
 sync
 
-kpartx -dv $DRIVE || true
+kpartx -dvg $DRIVE || true
 
 umount $DRIVE || true