If this document does not correspond to your current software version, you can go to Download Center to find other available document versions.

QNAP

QNE Network 1.0.x

Download (PDF)

Failover and Switchover

In an HA configuration, the standby node device is configured to quickly take over all services when the active node device fails. This takeover process is called a failover when it is automatic, and a switchover when it is performed manually.

After a failover or switchover, the standby node device becomes the new active node, and the failed active node device becomes the new standby node, allowing the failed device to be repaired while its services continue to operate on the new active node with minimal interruption.

Note:

  • The amount of time it takes for services on the original active node to resume on the new active node depends on what applications were running on the original active node and the amount of resources they used. For example, if you were running VMs in Virtualization Station, the takeover process would require more time.

  • System configuration data or application data may be lost if the takeover process occurs during data synchronization.

Tip:

If you are running VMs in Virtualization Station, QNAP recommends taking snapshots of the VMs before performing a switchover. This protects your data and minimizes data loss during the takeover process.