HP P2000 G3 - LUN will only map to one VM over iSCSI?

[SteeveeH]

Hi Guys

Really weird issue

I want to pass a LUN through to two VMs to create a SQL cluster and have pointed the iSCSI initiator at the P2000 G3. The P2000 has picked the IQN's up fine.

I've then created a LUN, and then attempted to mask to one of the VMs. If I mask to the first one.. say iqn:sqlhosta then for some reason for the mapping goes to iqn:sqlhostb... and vice versa

I also can't map to both at the same time for some reason ?

Virtual Machines are running Windows Server 2012. Using the same storage for the hyper-v host cluster and that works no probs, running Ws2012 too. 

Is there anything I should know about connecting storage via iSCSI and the p2000 through to Hyper-V virtual machines?

Thanks

Steve