luactivate -n zfs_nv_110

I had some problems going up to snv_110, basically because I didn't investigate the output from my luactivate.

[root] deckard:/root # luactivate -n zfs_nv_110
System has findroot enabled GRUB
Generating boot-sign, partition and slice information for PBE
WARNING: <2> packages failed to install properly on boot environment .
INFORMATION: on boot
environment contains a list of packages that failed to
upgrade or install properly. Review the file before you reboot the system
to determine if any additional system maintenance is required.

I ignored this and the reboot did not work - the box just hung before it even set the hostname.
To cut a dull story short, I eventually checked the logs, and the 2 packages were SUNWopensslr and SUNWxwfnt. X-Windows fonts aren't very interesting and I resolved that problem by following a post on the opensolaris.org forum. The SUNWopensslr package was the one that caused the problems. By manually removing and readding that package (with a bit of hackery) the box was able to boot successfully.

Moral: Read output, check logs. Muppet.