We've got a windows 2008 r2 server running as a DomU guest on Debian with Xen as Dom0. Its drive has gotten full, so I've extended out the volume to give it more space.
virt-manager shows the new disk size correctly, but I don't think it has passed through to virtual machine. On other virtual machine hosts I can simply run
diskpart and it will show the additional space.
I'd love to be able to resize these disks without downtime. Anyone know if this is possible?