CMMVC8786E The node cannot be added because it does not support encryption, and encryption is in use for some SAN MDisks.
Explanation
Encryption is enabled. An attempt was made to add a node that is not
encryption-capable while storage pools were being encrypted that include SAN MDisks that are not
self-encrypting.
User response
Acquire an encryption capable node, or remove all non-self-encrypting SAN MDisks
from all encrypting storage pools.