Hello continuum, WoodyZ,
I appended the requested files to this post. Unfortunately I did already reboot the machine several times before posting my initial request when I tried to get the data back, so there is only one logfile left that contains information about the state before the accident (which happened at 19:30 on September 17th).
I hope there is enough left to get an idea of what might have been happened.
Thanks for your help so far!