How to view entire vhd/vdi forest on xenserver?

Question

LVM

There is xenserver 6.0 with storage on lvm/vhd.
I would like to see what happened with the disk images as a result of cloning and deploying virtual machines from templates.
With the help vhd-util scan -l ${sr-uuid}you can see the list of vhd along with the parent.
But how to attach them to vdi?
Through xe vdi-list sr-uuid=${sr-uuid}it is possible to receive the vdi list, but there all fields of type parent are empty or 'not in database', and where the link to vhd is not entirely clear.
But just do I would like a direct picture, for example, in .dot.