Ok. I have two sites. Each site will have two multi-role Exchange 2010 SP2 servers. I would like to have two two member DAGs (with DAC) because both sites have active users, and both sites would need to be protected from hardware failures/disasters. The sites are connected by low latency, high bandwidth VPN. If the connection between the sites fails, both sites need to be able to continue to have access to their mailboxes.
My questions is this: can a server be a member of both a CAS array and a DAG, even if the CAS array is for a mailbox database that's on a different DAG?
Below is a basic diagram of my design. Will it work? Are there any glaring problems to my design? Any potential for problems?
Thanks in advance!