diff --git a/group_vars/all.yml.sample b/group_vars/all.yml.sample
index ac7f24433..3703c5614 100644
--- a/group_vars/all.yml.sample
+++ b/group_vars/all.yml.sample
@@ -373,7 +373,7 @@ dummy:
 #osd_objectstore: bluestore
 
 # Any device containing these patterns in their path will be excluded.
-#osd_auto_discovery_exclude: "dm-*|loop*|md*"
+#osd_auto_discovery_exclude: "dm-*|loop*|md*|rbd*"
 
 # xattrs. by default, 'filestore xattr use omap' is set to 'true' if
 # 'osd_mkfs_type' is set to 'ext4'; otherwise it isn't set. This can
diff --git a/group_vars/rhcs.yml.sample b/group_vars/rhcs.yml.sample
index 093a40be5..dbef7afb3 100644
--- a/group_vars/rhcs.yml.sample
+++ b/group_vars/rhcs.yml.sample
@@ -373,7 +373,7 @@ ceph_rhcs_version: 3
 #osd_objectstore: bluestore
 
 # Any device containing these patterns in their path will be excluded.
-#osd_auto_discovery_exclude: "dm-*|loop*|md*"
+#osd_auto_discovery_exclude: "dm-*|loop*|md*|rbd*"
 
 # xattrs. by default, 'filestore xattr use omap' is set to 'true' if
 # 'osd_mkfs_type' is set to 'ext4'; otherwise it isn't set. This can
diff --git a/roles/ceph-defaults/defaults/main.yml b/roles/ceph-defaults/defaults/main.yml
index e9f633205..014406067 100644
--- a/roles/ceph-defaults/defaults/main.yml
+++ b/roles/ceph-defaults/defaults/main.yml
@@ -365,7 +365,7 @@ osd_mount_options_xfs: noatime,largeio,inode64,swalloc
 osd_objectstore: bluestore
 
 # Any device containing these patterns in their path will be excluded.
-osd_auto_discovery_exclude: "dm-*|loop*|md*"
+osd_auto_discovery_exclude: "dm-*|loop*|md*|rbd*"
 
 # xattrs. by default, 'filestore xattr use omap' is set to 'true' if
 # 'osd_mkfs_type' is set to 'ext4'; otherwise it isn't set. This can