@@ -963,9 +963,9 @@ func (devices *DeviceSet) initDevmapper(doInit bool) error {

 	// https://github.com/docker/docker/issues/4036

 	if supported := devicemapper.UdevSetSyncSupport(true); !supported {

-		logrus.Warnf("Udev sync is not supported. This will lead to unexpected behavior, data loss and errors")

+		logrus.Errorf("Udev sync is not supported. This will lead to unexpected behavior, data loss and errors")

+		return graphdriver.ErrNotSupported

 	}

-	logrus.Debugf("devicemapper: udev sync support: %v", devicemapper.UdevSyncSupported())

 	if err := os.MkdirAll(devices.metadataDir(), 0700); err != nil && !os.IsExist(err) {

 		return err