The bash script with a snapshot logic is really simple and straight-forward without any difficult parts. So you can easily configure it, to serve your needs.
Netapp SnapVault is a heterogeneous disk-to-disk backup solution for Netapp filers and heterogeneous OS systems (Windows, Linux , Solaris, HPUX and AIX). Basically, Snapvault uses netapp snapshot technology to take point-in-time snapshot and store them as online backups.
The article explains how to install and use luckyBackup on an Ubuntu 9.04 desktop. luckyBackup is an application for data back-up and synchronization powered by the rsync tool. It is simple to use, fast (transfers over only changes made and not all data), safe (keeps your data safe by checking all declared directories before proceeding in any data manipulation ), reliable and fully customizable.
The default GNU tools can be used to split a big DVD ISO to smaller files for writing multiple CD's. Later the files can be converted to the big ISO again.