Comment 2 for bug 1285197

To generally reproduce what is going on here via use of /dev/loop0, we can
do:

imgurl="http://cloud-images.ubuntu.com/trusty/current/trusty-server-cloudimg-ppc64el-gpt1.img"
 imgdist="${imgurl##*/}"
 wget "$imgurl" -O "$imgdist"
 qemu-img convert -O raw "$imgdist" my.img
 qemu-img resize my.img 10G
 LODEV="/dev/loop0"
 sudo losetup $LODEV "$PWD/my.img"
 mkdir ./mp
 sudo mount ${LODEV}p1 ./mp
 sudo growpart "$LODEV" 1

 sudo umount ./mp
 sudo losetup -d "$LODEV"