I've noticed that if I use a persistent image file and for some reason it gets corrupted (powering off abnormally) that I'll get a bunch of filesystem errors in dmesg. I can fix it by booting with the "noimage" cheat code, like "knoppix64 2 noimage" and then run "fsck.ext2 /mnt-system/KNOPPIX/knoppix-data.img" and then "sudo reboot".
It'd be really nice if there were an automatic check of the ext2 image when knoppix boots. It would also let you know if errors have crept into your filesystem since knoppix still works but you see weird messages like "unable to write /etc/fstab".
2 Vintage Collector TOSHIBA Laptop Computer HARD DRIVES 750GB 640GB untested
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ATI Rage IIC AGP 3.3v Vintage Gaming Video Card 4MB - Tested, Working
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(2) Vintage Mechanical Key Switches CHERRY M7 GOLD CROSSPOINT M61-0120, Working
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SMC 5016T-013 Dual Baud Rate Generator IC, Vintage Ceramic Gold ~ US STOCK
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Vintage Face Plate Switch Console Control Board Front Panel 105315-01 AED-8000
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