Hi,
If I well understand what your are asking you want to copy a qtree to another volume and then Migrate it to CDot.
This is possible in 7Mode using QSM (Qtree SnapMirror)
The procedure will be to create a destination volume on the 7Mode machine then create q QSM relationship based on your Qtree.
After initialization, you will need to do a cuttover so you aplication will use the newly created volume. Then you will need to remove the qtree from the original location.
After cuttover you will now be able to migrate thius single Qtree to CDot 😉
BR
David BENADIBA