If you use custom setup, you need to have the same partitions/LVs that are used by default .
Can you give a screenshot of the installer?
Best Regards,
Strahil Nikolov
In my case it was indeed with the ovirt-node-ng iso, not tested in other way.
In 4.3 you were able, also with the iso of the ovirt-node-ng, to create different size partitions customizing the setup page (eg if you have gluster and want bigger /var than the default...).