I was able to import a hyper-v image with a simple
qm importdisk 102 OldServerName.vhdx local-zfs, but I have not been able to figure out how to import an EFI disk yet. I think it is in the exported path of ~/OldServerName/Virtual Machines/<UUID>.vmgs that was created by the hyper-v exportation. Is there a qm command I am missing or do I copy this to a location and just attach it?