Quote Originally Posted by kl522 View Post
I don't want to jump to conclusion as to the cause of corruption, nevertheless, KNOPPIX indeed can possibly not umount the file systems properly when shutdown. But I am surprised that no one seems to be bothered about this as I pointed out in some other thread.

If you do 'du -h -s /UNIONFS' it can be bigger than your ram size, as I notice it's always the case on my computer. I haven't investigated what's the significance of this. But if you do 'df', you should see that /UNIONFS is always showing the maximum size of your persistent store ( knoppix-image ).

Yes, please find a consistent way you could repeat this problem and report back.
I think one underlying problem is that Knoppix is not more of a community effort, so bugs are allowed to creep in and stay there too long, because testing and debugging resources are lacking.
If the uncontrolled growth is because of things like updating, one fix might be to use a second image for that kind of storage. (Doing du --max-depth=3 regularly could give som clue as to the dynamics of space requirements.) I have three images mounted at the time. Another solution is of course to skip FAT32 limitations, but that would be less portable.

What is the image updating strategy of Knoppix? I would not be astonished if writings to disk are minimized, to keep USB sticks alive longer.