I found a sympatic shareware program to analyze the AllLogEntries files. This tool generates a statistic with all the backups, restores, duplication etc that can be found in the in the log file. A graphical statistic shows the time usage of each drive, grouped per media server. If someone is interested in finding this soft, it can be required by mail at nbanalyzer@pt.lu.
Does someone know if there is an equivalent for BackupExec? It's easier if you get only log files for analyze to find errors faster and to fix problems asap.
