2 hyper-v nodes with shared storage (HP VSA)

Hi,

I want to use the HP VSA as shared storage for 2 hyper-v nodes.

Short Question: Can I start a virtual machine stored (vhdx file) on the shared storage on BOTH nodes? i.e. if one node fails
(Would be the simplest setup with manual failover, I think)

Or do I have to use fail-over-cluster?
If yes, is a cluster with only two nodes supported (I read about an additionally LUN for heartbeat or something like that)?

Thank you!

rib11