ZFS Root Won't Mount - Unknown Filesystem

[Warren Block]

On Sat, 7 Jan 2012, Drew Tomlinson wrote:

> Unfortunately because I can't figure out how to get a LiveCD type environment 
> with sshd running, I can't copy and paste exact error messages or command 
> outputs.

Martin Matuska's excellent mfsBSD can do that:
http://mfsbsd.vx.sk/

One of the new FreeBSD-9 install CDs can probably do it also, but may 
have a different version of ZFS.