Knoppix file size limit?

[Michael Hipp]

I'm attempting to use Knoppix 3.7 to take a complete hdd image of an XP 
box I'm about to mangle. I did:

dd if=/dev/hda of=/mnt/public/hddimage.iso bs=8k

Where that mount point is on another box running Samba. Well the .iso 
got up to 2.1GB when it quit with "File size limit exceeded." I then 
noticed that Knoppix runs kernel 2.4.27.

Is this a "feature" of that kernel? Any way around it?

Michael