fix script

conf/mount_disk.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 if [ "$VIRTUALISATION" = "true" ] 
 then
-    final_path=__FINALPATH__
+    datadir=__DATADIR__
     format=$1
     i=0
     while $(fdisk -l /dev/nbd$i  1&>2 /dev/null)
@@ -10,10 +10,11 @@ then
     done
     echo $i
     modprobe nbd max_part=$(( i + 1 ))
-    qemu-nbd --connect /dev/nbd$i $final_path/garage_data.qcow2
+    qemu-nbd --connect /dev/nbd$i $datadir/garage_data.qcow2
     if [[ "$format" = "true" ]]
     then
         mkfs.ext4 /dev/nbd$i > /dev/null
     fi
+    mkdir -p $datadir/data
     mount /dev/nbd$i $datadir/data/
 fi