port-sparc64/40306: bootblk problems with raidframe RAID1 root

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>Number:         40306
>Category:       port-sparc64
>Synopsis:       bootblk problems with raidframe RAID1 root
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-sparc64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 31 03:15:00 +0000 2008
>Originator:     Christian Kujau
>Release:        4.0.1
>Organization:
>Environment:
NetBSD hamma 4.0.1 NetBSD 4.0.1 (GENERIC) #0: Wed Oct  8 01:13:20 PDT 2008  
builds@wb32:/home/builds/ab/netbsd-4-0-1-RELEASE/sparc64/200810080053Z-obj/home/builds/ab/netbsd-4-0-1-RELEASE/src/sys/arch/sparc64/compile/GENERIC
 sparc64

>Description:
Installing a bootblock on a disk which is part of a raid1 root-mirror currently 
leaves the sytem in an unbootable state:


> boot disk
.Inode not directory
Fast Data Access MMU miss


This has been reported on the sparc-64 list, a possible workaround is 
documented in the same thread:

http://mail-index.netbsd.org/port-sparc64/2008/12/04/msg000659.html

>How-To-Repeat:
1a) follow instructions on how to set up a raid1 for "/" as described in
    http://www.netbsd.org/docs/guide/en/chap-rf.html#chap-rf-moving-files

1b) /usr/sbin/installboot -v /dev/rwd1a /usr/mdec/bootblk

 2) boot the system off the OBP, the following error will be written,
    booting does not continue:

> boot disk
.Inode not directory
Fast Data Access MMU miss
>Fix:
http://mail-index.netbsd.org/source-changes/2008/06/29/msg207490.html