When the production site becomes unavailable, the failover process must be manually initiated. The pod on the disaster site should be promoted to allow writes. To promote a pod using command line on the disaster recovery site execute on the disaster recovery site (target array):
Disaster Recovery Site: From the FlashArray command line execute:
purepod promote <pod_name>
From FlashArray Graphical User Interface select (see Figure 6):
Storage ➤ Pods ➤ <pod_name> ➤ '⋮' (vertical ellipsis) ➤ Promote
Figure 6.
Even after the pod promotion, the pod replica links status will remain “unhealthy” and the “Lag” will be increasing. Once the production site is restored, the disaster recovery site can be either re-protected or failed back.
2. Disaster recovery site: mount the volumes and start MongoDB instances