I am currently evaluating Knoppix. I want to boot with Knoppix
and save the contents of all my partitions to a DI-30 streamer cartridge
from Onstream.

Actually it must work due to the statements on the pages

http://www.linux1onstream.nl/test/ide-tape.html
and
http://www.onstream.com/linux/index.shtml

But how do I integrate the streamer access/driver/settings on a knoppix CD?

Any help is appreciated
Thomas