Make sure we have the VG in the snapshot name

scripts/backstep-traceback-auto

@@ -78,7 +78,7 @@ do
 			;;
 			*)
 				LVM_SNAPSHOT_ARGS+=("--lvm-snapshot")
-				LVM_SNAPSHOT_ARGS+=("$ITEM")
+				LVM_SNAPSHOT_ARGS+=("lvm-raid/$ITEM")
 			;;
 		esac
 	done