6027-2377 [E] Node `nodeclass` cannot be deleted. It is marked for use by Transparent Cloud Tiering. To remove this node, first disable it with mmchnode --cloud-gateway-disable.

Explanation
Cannot delete a node that has cloud gateway enabled.
User response
Disable the node first with mmchnode --cloud-gateway-disable.

6027-2377 [E] Node nodeclass cannot be deleted. It is marked for use by Transparent Cloud Tiering. To remove this node, first disable it with mmchnode --cloud-gateway-disable.