Knoppix always missed the nilfs2-module & userland utility => I always ended up using PR Rescue ( http://prrescue.prnet.org/index.php/Main_Page ) to be able to mount partitions of the devices that weren't able to boot anymore (I usually use nilfs2 for the root partition).
Wow, now that sounds interesting. I think I never, ever heard about nilfs2 since the times it was mainlined (circa 2005). Altough interesting, I sincerely thought it was stale and destined to oblivion. Care to describe why you prefer it? Personally, I'm all in with btrfs (another niche FS nowadays), and I am very happy about it.
