Given how inexpensive NAS servers are these days, there does not seem to be any excuse for this.
1. Two separate RAID servers with geographical separation
2. Real time RSYNC between the two
3. A domain/DNS provider which will automatically fail over to the backup server
4. Grandfather-father-son backup strategy, with periodic checks the backups can be restored.
5. Multiple sys admins
Biting the hand that feeds IT
