I don't think this is a full backup, I've tried it and it give me a 4 Gb backup archive but I have 20 Gb data in ibays.
It should be a full backup of the configuration, users and passwords, custom templates and /home/e-smith/. Here is the list.
'home/e-smith',
'etc/e-smith/templates-custom',
'etc/e-smith/templates-user-custom',
'etc/ssh',
'root',
'etc/sudoers',
'etc/passwd',
'etc/shadow',
'etc/group',
'etc/gshadow',
'etc/samba/secrets.tdb',
'etc/samba/smbpasswd',
'etc/smbpasswd',
NOTE: It does NOT backup web apps in the /opt directory.
Please check your smeserver.tgz tar file and determine if the backup is incomplete. If it is incomplete, report this to the bug tracker.