I'm new in Ovirt, loving it, but i'm having some doubts when it comes to add FCP Storage. I have two clusters, one called Production and the other Development, each cluster with two nodes and i want to configure Data Domain. My doubts are: 

1 - Every nodes must have connection to de FCP? If only de SPM have it, if it falls, who can connect to the storage?

2 - I have only one LUN in EVA HSV300 for me and i want to add three Storage Domains (Data, ISO e Export). Is it possible? How? This is because when i add data storage domain and choose the only LUN available it warn me that all data is going to be lost "This operation might be unrecoverable and destructive"

3 - Any advice about best practices about implementation?

Thanks