--- src/sys/kern/subr_diskslice.c	2008/04/20 13:44:25	1.50
+++ src/sys/kern/subr_diskslice.c	2008/08/29 20:08:36	1.51
@@ -222,7 +222,7 @@ doshift:
 	 * Disallow writes to reserved areas unless ds_wlabel allows it.
 	 */
 	if (slicerel_secno < sp->ds_reserved && nsec &&
-	    bp->b_cmd != BUF_CMD_READ && sp->ds_wlabel == 0) {
+	    bp->b_cmd == BUF_CMD_WRITE && sp->ds_wlabel == 0) {
 		bp->b_error = EROFS;
 		goto error;
 	}