Disaster prevention.

[utu]

@ vkrishn

For example:
I now have about 400 MB unused on my LiveUSB with persistence.

If I were to initiate a 700 MB download, that would proceed
until the device was 'full' at which time I would get a
warning 'no more room on the device'.

At this point the LiveUSB is corrupted and will not reboot
after shutdown. I think some some protection against this condition
is in order.

The few work-arounds I've tried are all harder than simply
re-installing from a previously arranged clone copy of the LiveUSB.

[vkrishn]

I guess that means using the space on disk directly and not inside the persistent storage.
The reason I asked, I have few usb installation wanted to be careful.

Did you try installing Knoppix in one partition of the disk and persistent/downloads on another partition, to see if the problem still exists?