I would be happy to work on documentation... not quite sure how I start doing that though.
The previous post and others that detail the only actualy datastores needed are data and
engine was helpful. Having an additional datastore for isos that would perhaps not need
to be (frequently) backed up also makes sense if you had a great deal of them. I am still
not that familiar with the documentation - I used the up and running with ovirt 4.2 blog
to get this setup. Thanks to all that replied.