[ovirt-users] possibly corrupted disk during 4.3 upgrade

I have a ovirt+gluster cluster that I've been running for a while now -- across several versions of oVirt. I was upgrading to 4.3 today, and am halfway through the upgrade. I've upgraded two of my four hosts to 4.3, as well as the engine, but the hosted-ha agents aren't running on my new hosts. Also, one of my two upgraded hosts won't connect to one of my domains -- I'm not sure whether that's the master data domain or the hosted engine domain. The *main* thing I'm concerned about, though, is that the disk for one of my large VMs appears to have been truncated -- it's virtual size is 300GB, I think the actual size was probably just under half of that, but it's actual size is now reported to be less than a gig, and it's taking up only 300MB of space. I'm afraid the answer is no, but I'm hoping that the data might be recoverable from somewhere on the bricks... Any thoughts? Jason