> Speaking of bootloaders, I have some local changes to the cobalt 
> bootloader to make it support booting from a RAIDFrame Mirror
> 
> I guess I should send-pr these, but if someone with commit access is 
> reading...
> http://www.rangat.org/rthille/Computer/NetBSD/Misc/sys-arch-cobalt-stand-boot-wd.c.diff

I think it's better to handle an offset of RF_PROTECTED_SECTORS
for FS_RAID in wdstrategy() rather than wdgetdisklabel().

How about this patch instead? (untested)

---
Index: wd.c
===================================================================
RCS file: /cvsroot/src/sys/arch/cobalt/stand/boot/wd.c,v
retrieving revision 1.5
diff -u -r1.5 wd.c
--- wd.c	11 Dec 2005 12:17:06 -0000	1.5
+++ wd.c	18 Jul 2007 14:21:07 -0000
@@ -43,6 +43,7 @@
 
 #include <machine/param.h>
 #include <machine/stdarg.h>
+#include <dev/raidframe/raidframevar.h>		/* For RF_PROTECTED_SECTORS */
 
 #include "boot.h"
 #include "wdvar.h"
@@ -254,7 +255,8 @@
 {
 	int i, nsect;
 	daddr_t blkno;
-	struct wd_softc *wd = f;
+	struct wd_softc *wd;
+	struct partition *pp;
 
 	if (size == 0)
 		return (0);
@@ -262,8 +264,13 @@
 	if (rw != F_READ)
 		return EOPNOTSUPP;
 
+	wd = f;
+	pp = &wd->sc_label.d_partitions[wd->sc_part];
+
 	nsect = howmany(size, wd->sc_label.d_secsize);
-	blkno = dblk + wd->sc_label.d_partitions[wd->sc_part].p_offset;
+	blkno = dblk + pp->p_offset;
+	if (pp->p_fstype == FS_RAID)
+		blkno += RF_PROTECTED_SECTORS;
 
 	for (i = 0; i < nsect; i++, blkno++) {
 		int error;
---
Izumi Tsutsui