Restart log files contain many lines like
[LOG:2011-01-27 16:35:05] Restart log for simulation empty-requin-2011.01.27-15. 21.30 created/opened with restart id 0, long restart id 0000
There should only be a log entry if the restart (or simulation) is modified. If an operation only examines the restart state, there should be no log entry.