diff --git a/sbin/mover b/sbin/mover
index 286ee0199..8dd825cef 100755
--- a/sbin/mover
+++ b/sbin/mover
@@ -88,6 +88,11 @@ start() {
 empty() {
   DISK="$1"
 
+  if [ ! -d "/mnt/$DISK" ]; then
+    echo "Error: disk '$DISK' not found"
+    exit 1
+  fi
+
   if [ -f $PIDFILE ]; then
     if ps h $(cat $PIDFILE) | grep mover ; then
         echo "mover: already running"