diff --git a/clusters/fixed-3.yaml b/clusters/fixed-3.yaml
index 2cae763a3df..0038432afa7 100644
--- a/clusters/fixed-3.yaml
+++ b/clusters/fixed-3.yaml
@@ -1,4 +1,4 @@
 roles:
-- [mon.a, mon.c, osd.0]
-- [mon.b, mds.a, osd.1]
+- [mon.a, mon.c, osd.0, osd.1, osd.2]
+- [mon.b, mds.a, osd.3, osd.4, osd.5]
 - [client.0]