diff -urN LVM2/lib/filters/filter.c LVM2.work/lib/filters/filter.c
--- LVM2/lib/filters/filter.c	2004-03-28 11:25:44.000000000 +0200
+++ LVM2.work/lib/filters/filter.c	2004-03-31 09:44:02.000000000 +0200
@@ -64,7 +65,7 @@
 static int _passes_lvm_type_device_filter(struct dev_filter *f,
 					  struct device *dev)
 {
-	int fd;
+	uint64_t size = 0;
 	const char *name = dev_name(dev);
 
 	/* Is this a recognised device type? */
@@ -74,15 +75,13 @@
 		return 0;
 	}
 
-	/* Check it's accessible */
-	if ((fd = open(name, O_RDONLY)) < 0) {
-		log_debug("%s: Skipping: open failed: %s", name,
-			  strerror(errno));
+	/* Check it's accessible and not empty */
+	dev_get_size(dev, &size);
+	if (size == 0) {
+		log_debug("%s: Skipping: Cannot open or empty", name);
 		return 0;
 	}
 
-	close(fd);
-
 	return 1;
 }