I have auto backup set up for Friday of each week.
Last week however my 2 biggest blogs failed to backup for some reason. The others went through fine.
Activity log showed the backup failed.
I then clicked on 'View Events' and this is the record.
29th Jun 2012 12.03.04 AM Error The backup failed: The server failed to retrieve the backup. The reason is unknown. Please consult the activity log. 29th Jun 2012 12.03.04 AM Error The server failed to retrieve the backup. The reason is unknown. The unknown error token the server returned was: UNKNOWN_FAILURE 29th Jun 2012 12.00.40 AM Information Deleted files processing completed. 29th Jun 2012 12.00.39 AM Information File collection completed. 29th Jun 2012 12.00.31 AM Information File system scan completed. 29th Jun 2012 12.00.29 AM Information Folder /public_html/wp-content/plugins/wponlinebackup/tmp was excluded. 29th Jun 2012 12.00.27 AM Information Database backup completed. 29th Jun 2012 12.00.23 AM Information Ignoring comments that are marked as spam. 29th Jun 2012 12.00.23 AM Information Ignoring comments in the trash. 29th Jun 2012 12.00.11 AM Information Initialisation completed. 29th Jun 2012 12.00.11 AM Information Backup starting...
I have since managed to manually backup both blogs with no problem, though both took a long time to complete.
Any idea on what the problem could be?