Well i lost my backup server, raid failed miserably.
Still i have other backups 
Dumb admin mistake, i started updating without backplan plan, old hardware , something gone wrong with integrated raid controller, later after os was updated it showed all disk offline, and later showed all arrays offline.
IT was lesson, not painfully still a lesson, backup should be done many many times.
I mean not only urbackup , but additionally via different tools.
Storage places apart, only then you are safe.