Sorry.  Some searching of the mailing list archives lets me know  
that this is a problem caused by me making the root partition FFS2.   
Oops.  Shame it doesn't work, but.  Can fix.  Thanks...

             - Chris

On Sep 21, 2007, at 02:00, Chris Ross wrote:
>   Okay.  More questions.  After I figured out that I'd partitioned  
> some things wrong, i did a reinstall.  This time, I didn't need to  
> break to a shell before letting sysinst run, like I did the first  
> time.  Since I wasn't changing the size of the underlying  
> components of the raid0 device, I just proceeded on to doing an  
> install.  I changed the partitioning of the raid0 device, did the  
> install, and all seemed okay.
>
>   But, (I'm on a sparc64 here), when I  try to boot off of the  
> disks, which used to work before I did this reinstall, I see:
>
> Rebooting with command: boot
> Boot device: disk0:a  File and args:
> NetBSD IEEE 1275 Bootblock
> Invalid superblock magic
> Fast Data Access MMU Miss
> {0} ok