I have a 4 node Hyper-V cluster running Windows 2008 R2. All the 4 nodes in the cluster are connected to an FC SAN where the VM's are stored. We are not using CSV but dedicated LUN for each VM.
I want to upgrade this to Windows 2012 R2. I do not have any extra servers, I just have to upgrade the existing servers to end up after the upgrade with a Windows 2012 R2 Hyper-V cluster using the same hardware.
Can this be done and what steps need to be followed? Would be grateful for any help.