BTW, I believe Daveu is right here. I think the command to install the ZFS 
compatible version of OpenSolaris GRUB on a hard drive that doesn't already 
have it installed is something like:

# installgrub -m /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c3d1s0

or for the RBAC way:

$ pfexec installgrub -m /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c3d1s0

where c3d1 is the name of the hard drive and s0 is the slice on the hard drive 
that you're putting the OpenSolaris GRUB on.

In case you're wondering how the naming scheme for hard drives works in 
Solaris, it's something like: controller number, target number, disk number 
slice number. So disk c0t0d0s0 would be controller zero, target zero, disk 
zero, slice zero.

I actually like the Solaris drive naming scheme better than Linux, because what 
happens in Linux when you have more than 26 drives and go from sda past sdz ? 
Some day I might actually find out. At least with the Solaris drive naming 
scheme, I know I'll probably never run out of integers to name drives after, 
and that's what I call scalability ;-)

Here's a good article on the Solaris device naming scheme for network devices, 
hard drives, etc:

http://initialprogramload.blogspot.com/2008/07/how-solaris-disk-device-names-work.html
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