Quote Originally Posted by FlameWeasel View Post
Anyway, I thought the automatic unmount done by Knoppix as it shut down would be fine.
I would consider that extremely optimistic. IMO, the safest way with special file systems is to execute suitable shutdown scripts. If you haven't already done it, I would also check out what Debian packages for RAID there may be, and install them.

If you find something lacking, I think this may be a good subject for a new post to the knoppix-devel mailing list, but the more you can find out yourself first, the better.
Good luck