With just the C: drive. defrag C: /H /U /V /X in cmd dos box seems to upset it. Was hoping to use this to clean up raw image before making it sparse. These raw images can be placed on a USB stick. Normally defrag is just a time waster. Now using qcow2 for general use on desktop.
[ 1039.091722] kvm: zapping shadow pages for mmio generation wraparound Linux pdc 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u3 (2016-01-17) x86_64 GNU/Linux qemu-system-x86_64 -enable-kvm -cpu host -localtime -usb -boot c -drive \ file=win7.qcow2,if=ide,index=0,media=disk,format=qcow2,detect-zeroes=unmap,discard=unmap \ -usbdevice tablet -net nic,vlan=0,model=rtl8139 -net user,vlan=0 \ -soundhw ac97 -m 2047M
