--- LVM2.2.02.43/lib/filters/filter.c~	2009-01-20 14:38:27.000000000 -0700
+++ LVM2.2.02.43/lib/filters/filter.c	2009-01-20 14:40:00.000000000 -0700
@@ -78,6 +78,7 @@
 	{"vdisk", 8},		/* SUN's LDOM virtual block device */
 	{"ps3disk", 16},	/* PlayStation 3 internal disk */
 	{"virtblk", 8},		/* VirtIO disk */
+	{"ub", 8},		/* USB block */
 	{NULL, 0}
 };