I have done some own customization on knoppix but I am not sure if it is originally like that or it's due to my own customization, the problem I have is my customized knoppix is not shutting down properly.

I have a knoppix-data.img which is unioned together with the readonly compressed imaged ( root file system ), the problem is that knoppix-data.img is not unmounted properly when I shutdown, and everytime it requires a fsck in the next reboot.

Anyone else has the same problem ?

In addition, my system sometimes did not power off properly, when it executes /etc/init.d/knoppix-halt, it will give 'input/output error' at certain line number of the script, and the machine will not power off. The problem is that it only happens intermittently - not always.