"can't find KNOPPIX filesystem."

[Belekor]

I've created a knoppix live cd, version 5.0.1, and i'm trying to boot it on my laptop but i keep getting the error:

"Can't find KNOPPIX filesystem. sorry.
Dropping you to a (very limited) shell.
Press reet button to quit.

Additional builtin commands availible:
cat mount umount insmod rmmof lsmod

knoppix_"

I've tried creating a 2nd disc, i've downloaded an older version and tried that, twice, using different software to create the disc and burning and 4x or 8x speed. I've tried numerous commands including nodma, failsafe plus all four "tips and tricks" commands on the wiki/cheat_codes page on this site.

anyone got any new ideas?

[wangji]

Two main reasons not to find the filesystem :
1 the "cdrom" is not found due to either ide-cd or scsi-cd (sr0) not properly loaded at boot (any away not builtin into kernel)

2 the cdrom found but not the KNOPPIX compressed file ,due to either improper cloop.ko (if cloop is used ) not fitted with kernel version in use or bad squashfs (not loaded, bad version 3.4 is quite different from < 3.3 )

Try debugging the following way when dropped into the "ash shell" .(you really need to examine /proc/_procfs because ash is so poor in commands compared to any recent busybox )

a cat /proc/filesystems to see which filesystems are recognised by the kernel
b cat /proc/modules to see what modules had been loaded properly
c ls /sys/block to see what block devices are recognised (lost of "ramj" ramdisk ,may be hdx or sdx depending on what
had been raised in config_compile_kernel with IDE and/or scsi stuffs )

d try mount /dev/whateverseenin_c /cdrom && ls /cdrom
if nothing seen in cdrom mounted then you spot your problem !

HTH