In my case, i started to make temporary back-ups with NT Backup.
This worked fine for 2 days, then i got errors telling me the RSM database was corrupt.
Looking for a solution to that problem, i found a article somewhere stating this could be due to a changed serial number for a tape drive. Which could have been the case, during troubleshooting and changing SCSI cards, the number can change.
The fix for this (the nt backup problem), was to stop the RSM service, delete the RSM database, start the RSM service so the database is rebuild. NT Backup worked again.
After that BE started working again without any errors, a bit weird since BE doesn´t use the RSM service. It´s even better to disable it when using BE.
Best regards,
Thomas