Upgrade to 2.3 fails on Hyper-V

[mewsense]

Running 2.2.6-RELEASE and upgrading to 2.3-RELEASE on Hyper-V 2012 R2 Core.

Has run flawlessly for a couple of years now on Hyper-V and this is my first upgrade failure. I ran the auto-upgrade from the web GUI and then I see this at the console when it reboots after the upgrade:

I have reverted to Checkpoint (hooray for VMs). Any ideas what I should do?

EDIT

I installed a new VM and it worked OK, except I could not get the WAN interface working on PPPOE. So it seems the mounting issue is resolved with a new install.

[cmb]

Hyper-V changed the disk device during the upgrade. You're fine now that you've reinstalled, but any others who encounter that, see this.
http://blog.stefcho.eu/upgrade-from-pfsense-2-1-5-to-2-2-on-hyper-v/

The PPPoE not connecting I'm guessing is either that NIC not being connected to the right virtual network, or maybe a PPP config issue (wrong user/pass or something). What do the PPP logs contain?

[mewsense]

Thanks, all fixed now.  :)