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09-28-2009 01:22 PM
Test to make sure that you can communicate both ways between the master and the media server.
Additionally run vmareq on the master to see that the media server is registered. It should show the media server and the drives.
Next run vmoprcmd and look for the host in the list to make sure that it is showing "Active".
If all else fails and it still fails to work, upgrade the media server, if it is a supported platform for 5.1.
Also turn on all the logs to verbose level 5, remove all the current day logs, run the backup and wait. If it still does not start, abort it and do a big log crawl so see if there are any of the little tidbits that may point to the problem.
Since you mentioend it is an Oracle backup, have you verified that the DBAs did not do anything that would have dropped the Oracle RMAN and/or NetBackup modules from the DB as part of some upgrade? Also what are the DBAs seeing when you kick off the backup? Is the DB starting and backup and going into the proper mode for that backup?