Got some more information now. I rebooted the computer. Got through the fsck (also the msdos disk). I mounted the disk without errors, then launched mc and the moment I pressed enter on the directory the disk was mounted on, the system froze up completely again but now I could take a picture of the output, I typed it here:
Code:
deget(): pcbmap returned 0
uvm_fault(0xfffffe822c395008, 0x10 0, 1) ->e
kernel: page fault trap, code=0
Stopped at msdosfs_lookup+0x53d: movq 0x10(%rax),%ax
ddb{0}>
Keep in mind I made a pic of my screen with my mobile and I've typed it manually here!
I get this code in blue background (like early boot kernel messages) and everything that was on the screen is simply overwritten.