Installing FreeBSD 6.2 on 9 TB RAID 6 disk - Guide to GPT?

[James Riendeau]

Is there a guide out there for installing on very large disks with  
gpt?  I can't seem to get it to work from what little I can glean  
from the archives and the man page.  I'm trying to install version  
6.2 on a 9 TB RAID 6 disk, and I can't get to a point where I have  
mountable partitions.  I keep seeing a message about an invalid  
superblock whenever I try to mount the new partitions.  I'm sure it's  
something simple I'm missing.

Thanks,

James Riendeau
MMI Computer Support Technician
University of Wisconsin-Madison