[root@block1:/etc/cinder]: cinder extra-specs-list
+--------------------------------------+----------------+-----------------------------------+
|                  ID                  |      Name      |            extra_specs            |
+--------------------------------------+----------------+-----------------------------------+
| 0dacc200-3ee3-4907-8720-f9e3e1462f90 |  Linux_Native  |                 {}                |
| a571e211-e068-46b1-8ae9-6e73c9c767a7 |      lvm       |  {u'volume_backend_name': u'LVM'} |
| ba596887-1b91-4c47-86bc-6dbd41d2fc6b | ceph-type-name | {u'volume_backend_name': u'ceph'} |
| c95a0322-8e8b-44a5-b11d-6c39dd92f21f |      Ceph      |                 {}                |
+--------------------------------------+----------------+-----------------------------------+