I just talked with Tech Support.  It looks like the problem is there is no clustering installed between the servers.  Unfortunately 2008R2 Standard doesn't support this so it looks like we're going to have to upgrade to Enterprise. Thanks for your time.
Hello, I was looking for some suggestions trying to my two servers to both see a MD3420 Array as shared storage.  The overview idea is here:  [URL] Initial setup was very easy.  I installed the Dell MD Storage software.  MPIO is installed, as is Storage Manager for SANs.  I was able to put a management IP address on the array, connect to it and create a disk group.    After that I was able to see both host's port identifier numbers and did the host mapping which seemed correct.  Once I did this I was expecting to the unformatted partition in Disk Management in Windows.  I'm not sure where to go from here.   I've upgraded firmware on the array, which went fine.  I've looked in the Storage Manager for SANs and it sees the LUN (though it says uknown number.)  Any help is appreciated. Additional Info: OS: Windows 2008 R2 Standard Bus Adapter:  www.lsi.com/products/host-bus-adapters/pages/lsi-sas-9300-8e.aspx PowerVault: MD3420 with one SAS module card  Thank you!
MD3420 SAS Connection to two R720 Servers (2008 R2)