Event Log ID 517
The backup operation that started at '2013-03-04T04:34:27.113260900Z' has failed with following error code '0xC03A0005' (The version does not support this version of the file format.). Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.
This annoying message might be caused by NAS SMB implementation subtleties. It might be caused by the fact that even though some of the backup utility interfaces let you do a system state backup to a share, there is also some information here and there that this is not supported.
I got around this using a technology I just learned about that has for a few versions been available either with a downloadable client or built in - iSCSI. I ignored this for a long time because I got burned by a lot of consumer SCSI and no longer saw its value for the non-enterprise. This let my NAS (a synology diskstation) project a volume out to the network that my windows machine could grab and format. It really makes the OS think this is a local drive and that seems to work for these backups. They work now. Appearently bare-metal recovery will now have a twist since the recovery setup does not know about iSCSI. I read about people sharing the iSCSI with a regular file share in this case. Ambitious people are creating windows setup disks with iSCSI.
Microsoft said about 5% of consumers were using windows backup so I feel ambitious enough. Windows Server 2012 Hyper-V guest backup as part of a regular backup is really nice. I think it works.
After a few weeks I can see this solution may not be as robust as I thought.... plenty of iscsi noise now... but maybe it is succeeding... maybe.