doc/ceph-volume update intro to mention dm-cache

Signed-off-by: Alfredo Deza <adeza@redhat.com>

diff --git a/doc/ceph-volume/intro.rst b/doc/ceph-volume/intro.rst
index 3869148880cc3fa9b88aab93a4e09328e7f07588..efb4ef2c5cd8e447c3d503b6ebab136a1cc0c37a 100644 (file)
--- a/doc/ceph-volume/intro.rst
+++ b/doc/ceph-volume/intro.rst
@@ -16,4 +16,8 @@ them.
 -------------------
 By making use of :term:`LVM tags`, the :ref:`ceph-volume-lvm` sub-command is
 able to store and later re-discover and query devices associated with OSDs so
-that they can later activated.
+that they can later activated. This includes support for lvm-based technologies
+like dm-cache as well.
+
+For ``ceph-volume``, the use of dm-cache is transparent, there is no difference
+for the tool, and it treats dm-cache like a plain logical volume.