Active-Active Controller Pair

Also known as dual-active. The status of a controller pair in which both controllers have specific logical drives assigned to them and handle I/O requests from the host for those logical drives.

If one of the controllers fails, and multi-path failover support exists, the logical drives are switched over to the other active controller.

This configuration is recommended over the active-passive configuration for performance reasons.

Active-Passive Controller Pair

In this configuration, one controller (the active controller) handles all of the I/O from the host, and the other controller (the passive controller) is held as a spare, taking over if the active controller fails.

Use the Controller >> Change Mode option to set a controller to active or passive mode. For more information, see Changing a Controller Mode.