[ovirt-users] PLEASE HELP - oVirt 4.0.5 Instability + Best way to rollback to 4.0.4

Hi oVirt ObiWan´s, Today i try to rollback 4.0.5 to 4.0.4 because some instability with the following method and i crash on a problem. :-( I shutdown oVirt Engine and make checkpoint on Engine VM ( Runs on Hyper-V, don´t ask me way ... ). Rollback vm checkpoint to point in time before 4.0.5 update process and power up ovirt engine vm. Everything ok but, six virtual machines that i create before this point in time does not exist on oVirt Engine Database and all came with external-VMNAME and i can not do nothing on them. I really think (only in my dreams ) that when ovirt engine goes up and talk with ovirt nodes, all new vm will be automatically discovered again. The worst thing are that i use SAN Storage Domain and oVirt use LVM to storage VM disks, so i don´t know how to find vm disks that ovirt engine does not recognize (external-VMNAME). After all that, i rollback again to 4.0.5 and every vm are ok now again, but i want to test this rollback process to 4.0.4 and do this on Production. I think the right steps are : 1. Run engine-backup /bin/engine-backup --mode=backup --scope=all --file=/root/ovirt/`hostname`.`date +%d%m%Y.%H%M%S`.ovirt-engine.bkp --log=/tmp/ovirt-engine_backup.log 2. Shutdown ovirt engine vm. 3. Make new checkpoint to rollback with something goes wrong 4. Rollback to checkpoint witch 4.0.4 5. Restore engine-backup (from version 4.0.5) 6. Start everything and check if all are ok This is the right way to rollback from one sub release to another ( 4.0.5 to 4.0.4 ) ??? This checkpoints/snapshots of ovirt-engine VM are the best way to rollback in time ??? Thanks in advance.