[Libguestfs] virt-v2v import from KVM without storage-pool ?

hi, i'm trying to import a VM in oVirt from a KVM host that doesn't use storage pools. this fails with the following message in /var/log/vdsm/vdsm.log: 2017-07-05 09:34:20,513+0200 ERROR (jsonrpc/5) [root] Error getting disk size (v2v:1089) Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/vdsm/v2v.py", line 1078, in _get_disk_info vol = conn.storageVolLookupByPath(disk['alias']) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 4770, in storageVolLookupByPath if ret is None:raise libvirtError('virStorageVolLookupByPath() failed', conn=self) libvirtError: Storage volume not found: no storage vol with matching path the disks in the origin VM are defined as <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/dev/kvm108/kvm108_img'/> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/some/path/CentOS-7-x86_64-Minimal-1611.iso'/> is this a virt-v2v or oVirt problem? thx matthias