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".
Dell PowerEdge R630 8SFF 2.6Ghz 20-Core 128GB Mem 2x10G+2x1G NIC 2x750W PSU
$399.04
Supermicro 4U 36 Bay Storage Server 2.2Ghz 16-C 128GB 1x1280W Rails TrueNAS ZFS
$716.98
Intel XEON E5-2699 V3 CPU PROCESSOR 18 CORE 2.30GHZ 45MB L3 CACHE 145W SR1XD
$45.00
HP Z620 Xeon E5-2620 v2 2.1GHz GTX 660 /16 GB /HDD 750 Windows 10 Pro
$95.00
Intel Xeon E5-2680 v4 2.4GHz 35MB 14-Core 120W LGA2011-3 SR2N7
$17.99
Intel Xeon E5-2699v4 SR2JS 2.2GHz 22-Core 55MB 145W Server Processor CPU
$144.95
Intel Xeon E5-2697A V4 2.6GHz CPU Processor 16-Core Socket LGA2011 SR2K1
$39.99
Intel Xeon Gold 6140 SR3AX 2.3GHz 18-Core Processor CPU
$39.99
HP Workstation Z640 2x Xeon E5-2623V4 32GB Ram Dual 256GB SSD K420 Linux GA
$234.98
Dell Precision T5600/t5610 Xeon E5-2670 2.6Ghz 16GB DDR3 RAM NO HDD Nvidia
$90.00