improper shutdown - root unionfs and power off

[kl522]

What remain unanswered is :-

1. The knoppix-data.img aufs2 with the readonly compressed loop root file system remained
mounted, as such the file system is not clean when the system halted.

2. Why is there a file system error at that point in time when the system was trying to run
'/sbin/poweroff' ? ( I tried to run 'auplink' also failed ).

[krishna.murphy]

What remain unanswered is :-

1. The knoppix-data.img aufs2 with the readonly compressed loop root file system remained
mounted, as such the file system is not clean when the system halted.

2. Why is there a file system error at that point in time when the system was trying to run
'/sbin/poweroff' ? ( I tried to run 'auplink' also failed ).

Did you run a self-test on the disk? Bad burns (common) and bad downloads (less common) can cause weird problems like this. Try one of these (as fits your disk) at boot time:

knoppix testcd
knoppix testdvd

Cheers!
Krishna