When designing a Hyper-V solution it’s a lot to think about regarding network and storage configuration. NetApp writes good best practise documents for Hyper-V. If you are in the process to install or optimize your hyper-v environment, I can reccomend  I really recommend you to read «NetApp Storage Best Practices for Microsoft Virtualization and NetApp SnapManager for Hyper-V» Even if Your Storage vendor is not NetApp 🙂

Get it here: http://www.netapp.com/us/media/tr-3702.pdf