It is a question I’ve been asked a while back, and didn’t find the time to search for it.
I have searched for an answer just now, and got to an answer given by one of the old-time gurus (most likely) in news servers (where the gurus lurk, usually). The answer is to use the command "filemon" in a syntax such as this:
filemon -O lf -o outputfile.txt
To stop the monitoring session, run "trcstop". Review the output file generated by this command, and you will be able to view the I/O interactions which happened during that time on the system.