Is there a "black box recorder" at the LHC? To explain the question further: are there real-time records of exactly what's going on and/or voice recorders, analogous to what there are in commercial jets? If there were to be a major catastrophe at the LHC, they would need to know precisely what was being done at the time, to try to find out what had caused it. Otherwise it would probably put a stop to research using colliders, worldwide and for a long time. Presumably it would have to be remote from CERN and would need high volume data transfer for all the trace information.