To use gnt-backup export on windows machines, you will need snf-image support.


root@r1u30:/home/dpavlin# cat /etc/apt/sources.list.d/snf.list 
deb http://apt.dev.grnet.gr jessie/
deb-src http://apt.dev.grnet.gr jessie/

root@r1u30:/home/dpavlin# gnt-cluster command apt-get install -y snf-image


Now modify win7x64vm machine to perform full disk backup

gnt-instance modify --os-type snf-image+default win7x64vm
gnt-instance modify --os-parameters=img_format=diskdump,img_id=windows7,img_properties='{"OSFAMILY":"windows"}' win7x64vm
gnt-backup export --noshutdown -n r1u32 win7x64vm