Index: mdconfig.c
===================================================================
RCS file: /home/ncvs/src/sbin/mdconfig/mdconfig.c,v
retrieving revision 1.49
diff -u -r1.49 mdconfig.c
--- mdconfig.c	26 Mar 2006 23:21:11 -0000	1.49
+++ mdconfig.c	27 Mar 2006 00:14:37 -0000
@@ -213,6 +213,13 @@
 		case 'u':
 			if (cmdline != 2 && cmdline != 3)
 				usage();
+			if (!strncmp(optarg, "/dev/", 5))
+				optarg += 5;
+			if (!strncmp(optarg, MD_NAME, sizeof(MD_NAME) - 1))
+				optarg += sizeof(MD_NAME) - 1;
+			mdio.md_unit = strtoul(optarg, &p, 0);
+			if (mdio.md_unit == (unsigned)ULONG_MAX || *p != '\0')
+				errx(1, "bad unit: %s", optarg);
 			mdunit = optarg;
 			mdio.md_options &= ~MD_AUTOUNIT;
 			break;