Yes I can reproduce this issue on Windows 10 with newest version of QEMU (until 03/28/2018)
I've posted my way of reproduce in a new bug issue: `#1759522 windows qemu-img create vpc/vhdx error` -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1367365 Title: qemu-img fixed vhd issues Status in QEMU: Incomplete Bug description: qemu-img returns fixed vhd images file format to be raw. This happens because only the header is seeked for image signatures when getting the image format. In fact, unlike dynamic vhd images, differencing vhds don't have the footer copied in the header. An easy fix would be to just search the last 512B for the 'conectix' signature. Also, the fixed vhds created by qemu-img seem to be corrupted from Powershell POV. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1367365/+subscriptions
