ceph-volume: docs for --prepare flag of lvm batch

Signed-off-by: Andrew Schoen <aschoen@redhat.com>
(cherry picked from commit b4825e1bd7b75a0a53ee5678230b262286293d75)

diff --git a/doc/ceph-volume/lvm/batch.rst b/doc/ceph-volume/lvm/batch.rst
index bf484b017d5536af973c48d5bb076ae240f1bca3..b55ae8db3682e0a0d388527bdcd32332ace13e8f 100644 (file)
--- a/doc/ceph-volume/lvm/batch.rst
+++ b/doc/ceph-volume/lvm/batch.rst
@@ -12,6 +12,8 @@ devices in an efficient way?
 
 The process is similar to :ref:`ceph-volume-lvm-create`, and will do the
 preparation and activation at once, following the same workflow for each OSD.
+However, If the ``--prepare`` flag is passed then only the prepare step is taken
+and the OSDs are not activated.
 
 All the features that ``ceph-volume lvm create`` supports, like ``dmcrypt``,
 avoiding ``systemd`` units from starting, defining bluestore or filestore,
@@ -19,6 +21,8 @@ are supported. Any fine-grained option that may affect a single OSD is not
 supported, for example: specifying where journals should be placed.
 
 
+
+
 .. _ceph-volume-lvm-batch_bluestore:
 
 ``bluestore``