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Overview of the switchover process

In the case of a site-wide issue, the MetroCluster switchover operation allows immediate resumption of service by moving storage and client access from the source cluster to the disaster site. The DR partner nodes begin serving data from the mirrored plexes and the sync destination SVM.

During the switchover operation, the system takes the following actions:

Root aggregates of the DR partners, while being switched over, are not brought online during switchover.

If you are only switching over services to the remote site, you should perform a negotiated switchover without fencing the site. However, for power maintenance, you should first take the plexes offline at the disaster site, fence the site, and then bring the plexes online. If storage or equipment is unreliable, you should fence the disaster site and then perform a negotiated switchover. Fencing prevents RAID reconstructions when disks power up in a staggered manner.