ceph-volume lvm.prepare add example of raw device or partition in help menu

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

diff --git a/src/ceph-volume/ceph_volume/devices/lvm/prepare.py b/src/ceph-volume/ceph_volume/devices/lvm/prepare.py
index f00c9e228aa64d7db30a8796a5e2060a2340306d..490c75dea013e6521144dcc1381965e81c9137f4 100644 (file)
--- a/src/ceph-volume/ceph_volume/devices/lvm/prepare.py
+++ b/src/ceph-volume/ceph_volume/devices/lvm/prepare.py
@@ -254,6 +254,10 @@ class Prepare(object):
 
               ceph-volume lvm prepare --filestore --data {vg/lv} --journal {vg/lv}
 
+          Existing block device, that will be made a group and logical volume:
+
+              ceph-volume lvm prepare --filestore --data /path/to/device --journal {vg/lv}
+
         Bluestore
         ---------