Host Clustering. Guest Clustering. About Blades and Clustering, File Share Majority and fail.

Hi
I have host clustering with guest clustering.
Host clustering with Windows Server 2008 R2 and CSV (Cluster Shared Volumes).

I have guest clustering (a file cluster an a SQL 08 cluster).

I have 2 blade chassis

The cluster has 3 nodes. Why?

The Node 1 and Node 2 are in the first Chassis

The Node 3 is in the second Chassi.

Everybody says that the chassis never fails. But I dont know. Maybe !!!!! ;-)

And

When I installed the therd node, the wizard advise me about the quorum disk,

Wich option is the best?

Well, Althoug No Majority disk is a bad option in the wizard, in my lab is the best option.

I shutdown The node 1 and node 2 (that is, the first chassis is down), and I can continue working with the Node 3 in the chassis 2.

I try to test other options, and I cant setup the cluster because I have 2 nodes out.

sAnTos