I have a DPM 2012 R2 in use, to backup Hyper-V 2012 R2 workloads across a bunch of servers. It's working great and I'm very happy with it.
The only issue I have is that the backups are accessible in the same network as the content they're backing up. So, for example, if someone in the same network decided to be malicious, they could delete the source but also the backup.
What I want to know is, without resorting to tapes, is there a somewhat simple way I can backup DPM to two other machines? I have two spare machines each with sufficient disk space to hold another copy of the DPM data that I'd like to use, in a rotation, so I can have the one not in use physically disconnected from the network, thus protecting it from a malicious attack.
I suppose I could try WSBU to backup DPM but I have a feeling that would be a disaster. I know I can chain DPM 2012 R2 servers but the chain has to be sequential, so this doesn't solve my problem, as all 3 servers would still need to be on the network at the same time.
Does anyone have any ideas? Microsoft says 3rd party products can be used to back up DPM but I'm not sure which ones are appropriate and I also kind of feel like this is probably achievable in the Microsoft world?
Any help would be appreciated.