Manual backup of /etc/gitlab/ directory

Hallo to everybody, newbie posting here.

Yesterday I setup my gitlab server with the community edition. Unfortunately I could not make the backup system working. I am running backups in a system in nfs with tricky privs.
So I just compressed and copied the directory /etc/gitlab where gitlab-data and other directories are saved

So I setup a crontable to run this command daily:
sudo sh -c 'umask 0077; tar -czvf ~/backup/daily.tar.gz /etc/gitlab'

In this way will it be a correct backup of repositories and user data?

How it is different the feature in the Enterprise Edition “Disaster Recovery”?