Also XenServer (and soon to be XCP-ng) have a vSAN type of approach as well.

I'd ask @olivier to explain how it all works though.

Good read and it explains very clearly what split-brain is, and how to prevent it in simple enough terms.

I've had to explain many times myself what split-brain is and ways to prevent it. I just get starred at. . .

I need to give this another go. They give some good PowerShell examples on building and monitoring a setup. At the time I tested it, there weren't any PS commands available for modifying anything. To make a change you had to wipe it & start fro scratch again... :-S