Redundant utility connections prevent an isolated outage from affecting power. Continuous power supplies eliminate surges and brownouts from utility power. Battery backup and diesel generators provide for 40 hours of full-load service. Smoke detection and fire suppression systems limit disruptions from fire. All the servers run RAID configurations for speed and availability improvements.
Power supplies are redundant, and network adapters are load balanced and redundant.
Backups are made using robotic tape autoloaders on a rotating schedule of full and incremental backups. Critical data is copied between machines regularly.