Q: Where is the specification for the VHDX format introduced in Windows Server 2012?

A: Microsoft has released the VHDX specification for general use at the Microsoft website.  VHDX is the new format of Virtual Hard Disk (VHD).

 I have another FAQ about VHDX from a couple months ago that you can check out as well: "Q: Can I convert a VHDX to a virtual hard disk (VHD) in Windows Server 2012?"

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