Index: geom_io.c
===================================================================
RCS file: /private/FreeBSD/src/sys/geom/geom_io.c,v
retrieving revision 1.58
diff -u -p -r1.58 geom_io.c
--- geom_io.c	27 Aug 2004 14:43:11 -0000	1.58
+++ geom_io.c	14 Sep 2004 06:32:46 -0000
@@ -445,7 +445,7 @@ g_read_data(struct g_consumer *cp, off_t
 	void *ptr;
 	int errorc;
 
-	KASSERT(length >= 512 && length <= DFLTPHYS,
+	KASSERT(length >= cp->provider->sectorsize && length <= MAXPHYS,
 		("g_read_data(): invalid length %jd", (intmax_t)length));
 
 	bp = g_alloc_bio();
@@ -473,7 +473,7 @@ g_write_data(struct g_consumer *cp, off_
 	struct bio *bp;
 	int error;
 
-	KASSERT(length >= 512 && length <= DFLTPHYS,
+	KASSERT(length >= cp->provider->sectorsize && length <= MAXPHYS,
 		("g_write_data(): invalid length %jd", (intmax_t)length));
 
 	bp = g_alloc_bio();