Index: sys/geom/part/g_part.c
===================================================================
--- sys/geom/part/g_part.c	(wersja 197195)
+++ sys/geom/part/g_part.c	(kopia robocza)
@@ -1456,6 +1456,12 @@
 	g_topology_assert();
 
 	/*
+	 * Skip providers that are already open for writing.
+	 */
+	if (pp->acw > 0)
+		return (NULL);
+
+	/*
 	 * Create a GEOM with consumer and hook it up to the provider.
 	 * With that we become part of the topology. Optain read access
 	 * to the provider.
Index: sys/geom/label/g_label.c
===================================================================
--- sys/geom/label/g_label.c	(wersja 197195)
+++ sys/geom/label/g_label.c	(kopia robocza)
@@ -271,6 +271,12 @@
 
 	G_LABEL_DEBUG(2, "Tasting %s.", pp->name);
 
+	/*
+	 * Skip providers that are already open for writing.
+	 */
+	if (pp->acw > 0)
+		return (NULL);
+
 	if (strcmp(pp->geom->class->name, mp->name) == 0)
 		return (NULL);