Either ssh into the 1100 or use the USB serial console directly. Use option 13 at the console menu to run the upgrade. If it still fails you should see more error output from there.

@kiokoman said in How take out configuration file from corrupted disk ?: from console if you are able to get there, mount a usb stick and copy the file ? Thank You for help! This is the first tough that come in to my head after I push "Post" button in this forum :)

Theoretically you should be able to import a config from any previous pfSense version. The upgrade scripts are cumulative so it should be updated to a current version complete with all the required chnages when you do. It's a relatively easy test. You can roll back to your current config from the console if it fails for some reason. If it fails yo boot to the console re-installing entirely is quite fast if you have the install media to hand. Particularly if you put the current config onto it so it boots up ready to go first time: https://docs.netgate.com/pfsense/en/latest/backup/automatically-restore-during-install.html If you WAN is wireless you should make sure you have tuned the monitoring to match that. It will almost certainly have higher layency and packet loss rates than other WAN types. You might just disable the WAN monitoring action for that gateway to be sure it's not triggering unnecessarily. Steve

Tried killing the firewall states ?