Great explaination of the the HV. If all the other VMs rely on the OS in the root partion then there had better be extremely good control of the drivers in that OS. What happens when monthly crits are released and the server core OS in the root partion has to be bounced? I guess you will have to take down all the guest VMs? Does anyone know if HV and server core will allow for a shared file system between multiple physical host (think VMFS)?