How shall I do backups?

[ciphergoth]

OK, I've used DAR long enough to know that it's fundamentally broken. I just gave up on it at the point where I'd written CD 1 of a two CD archive, and said "please test the integrity of this slice of the archive". It responded "last slice is not present, please provide before integrity can be tested".

So I'm not using that any more.

What the hell can I use that does proper multi-archive backups for CDs?