Shared Storage for Hyper-V
We know that Hyper-V supports migration of virtual machines between physical hosts. To migrate virtual machines independently, each virtual machine must be stored on its own SAN storage LUN or copy would require you to use BITS over the Ethernet network.
Else if you would like to keep your virtual machine on a common storage and provide access to all available host you require clustered file system.
Sanbolic offers shared storage solution for Hyper-V, there is no need to create a separate LUN for each virtual machine, while providing the ability to migrate virtual machines independently.