From: Alfredo Deza <adeza@redhat.com>
Date: Mon, 16 Apr 2018 16:50:02 +0000 (-0400)
Subject: doc/dev/ceph-volume add VDO tag information
X-Git-Tag: v12.2.5~8^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a9c16920d3b45f82b6f879d66901a5aba5ab822e;p=ceph.git

doc/dev/ceph-volume add VDO tag information

Signed-off-by: Alfredo Deza <adeza@redhat.com>
(cherry picked from commit eeff3463543c12874ca4dfc3c3852af539d318f2)
---

diff --git a/doc/dev/ceph-volume/lvm.rst b/doc/dev/ceph-volume/lvm.rst
index ceac235cdb6..b3e6bee122e 100644
--- a/doc/dev/ceph-volume/lvm.rst
+++ b/doc/dev/ceph-volume/lvm.rst
@@ -166,3 +166,14 @@ the partition UUID.
 Example::
 
     ceph.wal_uuid=A58D1C68-0D6E-4CB3-8E99-B261AD47CC39
+
+
+``vdo``
+-------
+A VDO-enabled device is detected when device is getting prepared, and then
+stored for later checks when activating. This affects mount options by
+appending the ``discard`` mount flag, regardless of mount flags being used.
+
+Example for an enabled VDO device::
+
+    ceph.vdo=1