It’s a good idea to test backups before disaster strikes. Unfortunately, a complete test can be risky. I’ll look at some alternatives.
You may not need every kind of rescue disc possible, but you should certainly have one from your backup program.
Many computers are now built without DVD drives. This can cause big problems when you need to restore your computer.
How you backup partitions depends on your backup software. Most allow you to backup multiple partitions into a single backup image file, but more than likely, you get to choose.