[ovirt-users] Involuntary emergency upgrade from 4.1 to 4.2

I'm looking for a hand in recovering my ovirt cluster from a hardware failure. The hard drive on my cluster controller failed, and I would like to recover from backup. The problem is, the cluster was 4.1, which is less than a year old, but was nevertheless removed from the active repositories back in May. 4.2 will not recover from 4.1 backups. The storage domains are all intact (I think), and the hosts are still running (unmanaged). I've tried to manually restore the engine from backups, but either the upgrade is reinitializing or I am missing something. Any ideas?