Windows 2008 Cluster. Blade, HA and so on

Hi

I have a discussion

I have 2 chassis blade.

The main chassi has a Hyper-V R2 Cluster. I have a SQL08 Cluster in VM.

In the second chassis, I installed a Node3.

If the first chassis fail, I have another chassis with one node.

But , he we are the problem

I have Node and File Share Witness for the cluster.

I have a notice about the cofiguration when I introduced the Node 3.

WICH is the best option?

The first option is not enough. If the first chassis is down. I only have the Node 3.

The last option is a solution, but It is not recommended.

Did Microsoft think in this problem?

I have VM for the cluster, but the Quorum options are wrong!!!!!!!!!!!!

sAnTos