Heho,
Unfortunately yes, you'll suffer from a down time during this
process.
Well, as the downtime could be significantly decreased/the comfort for
an "migrate one vm, then the next" largely increased, if an nfs storage
could be mounted on multiple datacenters simultaneous i wonder if such a
feature is planed?
Main concern for me is that it might not really fit into the current way
of handling storage in ovirt.
With best Regards,
Tobias