If you are running this on a KNOPPIX system, I would like to believe that you will have these :-
Code:
$ ls -al /dev/cloop*
lrwxrwxrwx 1 root root      6 2010-08-30 23:14 /dev/cloop -> cloop0
brw-rw---- 1 root disk 240, 0 2010-08-30 23:14 /dev/cloop0
brw-rw---- 1 root disk 240, 1 2010-08-30 23:14 /dev/cloop1
brw-rw---- 1 root disk 240, 2 2010-08-30 23:14 /dev/cloop2
brw-rw---- 1 root disk 240, 3 2010-08-30 23:14 /dev/cloop3
brw-rw---- 1 root disk 240, 4 2010-08-30 23:14 /dev/cloop4
brw-rw---- 1 root disk 240, 5 2010-08-30 23:14 /dev/cloop5
brw-rw---- 1 root disk 240, 6 2010-08-30 23:14 /dev/cloop6
brw-rw---- 1 root disk 240, 7 2010-08-30 23:14 /dev/cloop7
For whatever reasons if you don't have them, then you manually create them :-

# mknod /dev/cloop1 b 240 1

You shouldn't be using /dev/cloop or /dev/cloop0 because that's already been used by KNOPPIX.

Yes, if the image is good, you shouldn't get any errors when you loop mount your new compressed image. But I still would like to believe that chances of a bad burn is higher. You should do a 'knoppix testcd'.

Cheers