Steven Bink, which is attending Microsoft Management Summit (MMS) 2007 in San Diego right now, reports a new detail on upcoming Windows Server Virtualization hypervisor (codename Viridian):
Besides hot add Nics, Mem and CPU’s in VM’s that run on Windows Hypervisor (Viridian) it will support live compacting of VHD’s. Now you when you have to take the VM offline after defragging the VHD.