Getting drive device output for ceph from undercloud introspection 

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In order to prepare the template for mapping ceph drives for the Redhat Openstack Overcloud run the following.

 openstack baremetal introspection data save <UUID>1a4e30da-b6dc-499d-ba87-0bd8a3819bc0 | jq ".inventory.disks"

(undercloud) $ openstack baremetal introspection data save 1a4e30da-b6dc-499d-ba87-0bd8a3819bc0 | jq “.inventory.disks”

Source: Deploying an Overcloud with Containerized Red Hat Ceph – Red Hat Customer Portal