So far i know, you can choose what you want to backup. So when you only backup your Data there should not be anything hardware-specific in it.
Okay... And all the Data is stored in /home, right?
The docs say that by default the entire system is backed up except /mnt, /dev, /media, /sys, /tmp, /var/cache and /proc which covers most of the hardware but INCLUDES /home. So the "Backup" backs up pretty much everything.
So, in theory, I could make a PXE Zentyal image and add a script to it that uses the "restore" app to call rsync or something to push the configuration back separately. Correct?
A good way would be clonezilla to make an image, but you have to shutdown the server.
It wouldn't be mounted then, would it?
This is intended for a production server that is intended to ALWAYS be up, 24/365.