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".
Cisco GLC-FE-100FX-RGD 100BASE-FX SFP Transceiver Module
$17.99
Cisco Meraki MA-SFP-1GB-SX 1000BASE-SX SFP Transceiver Module
$24.99
Cisco Meraki MA-SFP-10GB-SR 10G SFP+ SR 850nm 300m LC MMF
$29.99
CISCO SFP GLC-GE-100FX 10-2019-02 100Base-FX SFP GBIC Transceiver Module 1pcs
$52.99
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
SFP-10G-SR Original Cisco 10GBASE-SR SFP+ V02 Multi mode Transceiver 10-2415-02
$5.00
Brand New Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Module 1310nm 10km SMF LC
$13.89
10Gbps 10GB SFP+SR transceiver for UniFi Switch 16 XG 16port Ubiquiti US-16-XG
$10.99
10 PCS Cisco GLC-LH-SMD 10-2625-01 1310nm SFP Transceiver Module
$85.00
New HP HPE Aruba J9150D 10G SFP+ LC SR 850nm 300m MMF XCVR Transceiver Module
$49.99