Fail Over a Controller Using the CLI

Failover requires one controller to be in Active mode and the other controller to be in Standby mode.

A failover switches management of the array from the active controller to the standby controller.

  1. Determine the name of the array.
    array --list
    The name of the array appears in the list.
  2. Perform the failover.
    failover --array array_name
    During the failover operation, the standby controller first goes into Solo mode, and then into Active mode. The active controller goes into Unknown mode, then into Stale mode, and finally into Standby mode. 
Nimble OS $ failover --array datamaster-a