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".
ASUS H110M-R Motherboard Intel 6th/7th Gen LGA1151 DDR4 Micro-ATX i/o shield
$42.00
***NEW*** BCM RX67Q Gaming Motherboard | Intel Q67 2nd/3rd Gen. | LGA1155 | DDR3
$29.77
***NEW*** BCM RX67Q mATX Gaming Motherboard Combo | Intel i5-3470 | 16GB DDR3
$49.77
ASRock B250M-HDV LGA 1151 Micro ATX DDR4 Desktop Motherboard w/ IO Shield
$54.99
Micro ATX Desktop Motherboard ASUS H110M-C LGA 1151
$31.95
Gigabyte AMD B550 UD AC Gaming Motherboard - AMD B550 Chipset - AM4 Socket - AMD
$89.99
ASUS Prime Q270M-C LGA1151 DP HDMI VGA SATA 6GB/s USB 3.0 MicroATX Motherboard
$37.99
Gigabyte GA-B75M-HD3 Intel LGA1155 DDR3 Desktop Motherboard MicroATX USB 3.0
$26.99
GIGABYTE MB10-Datto Motherboard Xeon D-1521- SR2DF 2.40 GHz- Open Box
$115.00
Gigabyte Technology GA-B85M-D2V Motherboard 1150 DDR3 M-ATX B85 USB3.0
$33.98