Dell Chassis Management Controller Version 3.10 for Dell EMC PowerEdge VRTX User's Guide

You can create a security key on a controller using an Encryption keyID and a Passphrase. The controller compares only the Passphrase used while creating security key to identify whether the two controllers have the same security keys. Therefore, two controllers joining a cluster are fault-tolerant even if they have different Encryption Key ID as long as they have the same passphrase.

If a security key mismatch is detected between two peer controllers, the fault-tolerant mode changes to ‘Degraded’. A critical alert is displayed on the Chassis Health page and monitoring may not display proper drive association.

If a security key mismatch is detected, resolve the key mismatch by creating, modifying, or deleting the security key on one of the controllers, before performing any other storage security operation on the controller. Power cycle the chassis after resolving the mismatch. Before combining two non-high availability controllers, modify the keys so that they match. This action facilitates import of secure drives associated with each controller joining the cluster.

For external controllers, modify the keys so that they match before cabling them for fault tolerance. The modification of security keys facilitates import of secure drives associated with each controller joining the cluster.