powerpc/170340: Enabling geom-mirror on 9.1-powerpc64 prevents the system from booting

[Daniel Morante]

>Number:         170340
>Category:       powerpc
>Synopsis:       Enabling geom-mirror on 9.1-powerpc64 prevents the system from booting
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ppc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Aug 02 20:40:11 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Daniel Morante
>Release:        9.1-BETA powerpc64
>Organization:
The Daniel Morante Company, Inc.
>Environment:
System is down (won't boot)
>Description:
I attempted to enabled the geom_mirror as detailed in the handbook. After rebooting I am receiving this error:

Invalid memory access at &SRR0: 00000000.0743f4c &SRR1: 90000000.00003030

Same issue on the other identical system, the error is slightly different:

Decrementer exception at &SRR0: 00000000.0743f4c &SRR1: 90000000.00003030

I can't boot either of them at this point, but they are not important. The two systems were built specifically for testing this.  Each system had 2 identical hard drives.

Screen shots of the error can be seen on the forum topic: http://forums.freebsd.org/showthread.php?t=33613 

Or Here:
http://www.daniel.morante.net/screenshot/IMAG0018.jpg
http://www.daniel.morante.net/screenshot/IMAG0022.jpg
>How-To-Repeat:
1) Clean install of FreeBSD 9.1 beta powerpc64 on a Apple Mac Pro G5 with two identical SATA disks.
2) Follow instructions as detailed in the FreeBSD handbook: http://www.freebsd.org/doc/handbook/geom-mirror.html
3) Upon reboot, system fails.
>Fix:
Unable to fix

>Release-Note:
>Audit-Trail:
>Unformatted: