We currently use DPM 2010 to protect several servers. We are looking for a cost effective way to backup about 300-400GB of data from this DPM box off site. We prefer to avoid tape backup due to the human nature of their effectiveness but it may well proove to be the most sensible and cost effective option.
It would be nice to protect the DPM server with another offsite DPM server via VPN although we are limited in having somewhere we can host a server. I'm open to other ideas.