Storage configuration variations for HA pairs

Because your storage management and performance requirements can vary, you can configure HA pairs symmetrically, asymmetrically, as an active/passive pair, or with shared disk shelf stacks.

Symmetrical (active/active) configurations
In a symmetrical configuration, each node has the same amount of storage.
Asymmetrical configurations
In an asymmetrical standard configuration, one node has more storage than the other node. This configuration is supported as long as the nodes do not exceed the maximum storage capacity.
Active/passive configurations
In active or passive configurations, the passive node has a root volume, and the active node has all of the remaining storage in addition to serving all of data requests during normal operation. The passive node responds to data requests only if it has taken over the active node.
Shared stacks
In this configuration, shared stacks between the nodes are particularly useful for active/passive configurations, as described in the Active/passive configurations bullet.