Failback: What Is It And How Does It Work? | Zerto


A-to-Zerto Glossary of Terms



Failback refers to the process of returning your system from its secondary location back to its primary location. While failback is sometimes part of scheduled maintenance, it is a crucial part of disaster recovery. Following a disaster, failback often occurs after failover. 

What Is Failback?

Failback involves returning a system that has been restored or recovered following a disaster or outage back to its original location or back onto its primary production infrastructure. An essential part of disaster recovery, failback can be set up between on-premises systems, between an on-premises system and the cloud, between cloud and cloud, or any combination of these. 

Failback is related to failover, which is the switching of the main system to the secondary location or infrastructure. During failover, the secondary system keeps your systems online and operational, allowing time for the outage to be resolved in the primary production environment. Failback to your original infrastructure or location then occurs when the outage has been rectified.

How Does Failback Work?

Failback is an essential operation, yet it’s often overlooked—it’s nonetheless critical to your disaster recovery and data protection strategy. In today’s always-on world, business continuity has become a requirement at the same time that emergency disruptions, resulting from a number of unavoidable causes, are more common than ever:

  • Natural disasters 
  • Digital heists and ransomware attacks 
  • System failures and outages

With a disaster recovery plan in place that includes failover and failback, your organization becomes resilient and able to easily resume operations with minimal downtime and data loss.

Example of Failover and Failback over a DR use case

Confidence in Failback Execution

Zerto has built-in orchestration and automation for all workflows around disaster recovery and data protection. Failback in Zerto can be configured with a single click which will automatically replicate any data changes back to the original location. You can then use our Move operation to gracefully failback your applications in a controlled manner, ensuring zero data loss. 

Zerto Solution Overview

Other Resources


Live Failover Confidence = Failover Testing

Testing is critical in ensuring your live failover will work as expected. Understand what is involved in a failover test. The same steps in reverse will get your failback.

Watch the Video

Failover Test Overview

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Get More Out of Failover Testing

See how failover testing can help you with DevTest and patch management / testing, with no impact on your production environment.

3-Step Failover Testing

See the major steps involved in a failover test, and how automation and orchestration make it easy, using Zerto as an example.

What is Zerto?

Learn about Zerto and how it can help you solve your data protection and recovery challenges.