Here are my notes on presenting a LUN from a 3PAR 7400 SAN to a Hyper-V 2012 server running no GUI. The SAN is connected to the server via Fiber. There is a FC switch in between which has been properly configure, zoned, etc. Multiple paths to the same LUNs are configured for redundancy and speed so we need MPIO. Procedure: 1. Install MPIO feature and reboot the Hyper-V server Note that I did not run the mpiocpl GUI or the mpclaim command as I described here earlier. You may have to do that. 2. From  inside the SAN management console, present a LUN to the Hyper-V server. Note: while…