Description: Warnings or Failures about Incremental backups being performed for exchange
Common customer description: My backups are failing, can you fix them?
I received an email that my backups have been failing
I got a call that my backups are failing
Probing questions: Was this recent?
How long have you been receiving these emails and/or phone calls?
Steps to isolate: Check the backup report for the errors and/or warnings
Steps to resolve:
1. Log into Barracuda web console
2. Check the backup report. What is the error or warning that it generates?
3. Barracuda cannot backup the mailbox when circular logging is enabled
- Why? When circular logging is enabled, transaction log files that have already been committed to the database are overwritten, preventing the accumulation of logs. The log files are overwritten whether or not a full or incremental backup has been run, and a history of previous logs since the last full or incremental backup is not maintained. This is why, when circular logging is enabled, differential and incremental backups of the Exchange databases cannot be performed (since these types of backups rely on complete history of logs). So basically, with circular logging enabled, only information included in the last full backup can be recovered.
4. To work around this, you will have to create a backup job specifically for the exchange server (if the server is a stand-alone server)
To do that go to the Backup Tab, then to Schedules
5. On the right hand side, go to Add a Schedule
6. Name the backup job (make it obvious – if it’s the exchange call it by the exchange server name)
7. Select the server that you want to back up (in this case, it will be mail2)
8. Select the days you want it to back up
9. Set the time you want it to back up (Barracuda runs in a 24 hour format – military time)
- Repeat means if you want the backup to run 2 or more times in one day
10. Choose the backup type – in this case we can’t do the incremental or “smart” backups, we will chose Full instead
11. Double-check the configuration. When you think it’s correct, on the top right, look for a green button called Save
Now you have to watch the backups for a bit, since we changed the backups to Full it might start taking up space. Monitor the job to make sure their disk space doesn’t get full.
Since we made a new backup just for exchange, we have to deselect the exchange server from the previous job(s)
1. Go back to step 5 but instead of adding a schedule, edit the existing schedule.
2. There might be a check box that says “backup all computers and data sources” – uncheck that box and unselect the exchange server. (Don’t forget to say save!)
Additional considerations: If there is only one server being backed up (example: server02 is the PDC, BK, MX, DNS, DHCP), switching the backup to Full might not be an option.