Comparison of HA pair types

The different types of HA pairs support different capabilities for data duplication, distance between nodes, and failover.

HA pair type Data duplication? Distance between nodes Failover possible after loss of entire node (including storage)? Notes
Standard HA pair No Up to 500 meters
Note: SAS configurations are limited to 5 meters between nodes when using SAS copper cables
No Use this configuration to provide higher availability by protecting against many hardware single-points-of-failure.
Mirrored HA pair Yes Up to 500 meters
Note: SAS configurations are limited to 5 meters between nodes when using SAS copper cables
No Use this configuration to add increased data protection to the benefits of a standard HA pair.
Stretch MetroCluster Yes Up to 500 meters (270 meters if operating at 4 Gbps)
Note: SAS configurations are limited to 20 meters between nodes when using SAS copper cables to connect disk shelves to controllers directly.
Yes Use this configuration to provide data and hardware duplication to protect against a local disaster (for example, a power outage to one node).
Fabric-attached MetroCluster Yes Up to 200 kilometers, depending on switch configuration. See the Interoperability Matrix at support.netapp.com/matrix. Yes Use this configuration to provide data and hardware duplication to protect against a larger-scale disaster, such as the loss of an entire site.