SCO UW disaster recovery

I'm having trouble finding documentation for SCO UW. Can anyone point
me to a good resource so I can RTFM?

My goal is to come up with a disaster recovery script and to test it.
At this point, we have no backup/restore software and do not have a
budget for any.

How do I back up our system using the native SCO UX commands?

Regards,
Way out of my comfort zone
.