Hyper-V Program Manager
In Windows Server 2012 / Windows 8 we have introduced a new virtual hard disk format called “VHDX”. There are a number of advantages to this format:
Last Friday we published the final specification for VHDX under our Open Specification Promise. You can download it from here: http://www.microsoft.com/en-us/download/details.aspx?id=34750
Could you please share the comparison between VHD and VHDX formats ?