Drop second disk from registry hosts

group_vars/registry.yml

@@ -1,6 +1,6 @@
 ---
-datadisks:
-  - 100
+# use bigger disk for os as we have web site data there
+dsk_size: 60
 glusterfs_group: registry
 firewall_in:
   - {proto: tcp, port: 22, from: [172.20.20.0/22]}