English to Bulgarian Other Computers (general)

"The production SQL servers use a various methods combining failover cluster management and database mirroring allowing xxx to keep downtime to a minimum with zero data loss in the event of disaster recovery needing to be invoked. Failover cluster management functionality allows the production database to failover to another SQL server in case of hardware or operating system failure. "

Интересува ме превода на глагола "to failover" в последното изречение. Благодаря предварително.