diff --git a/devstack/settings b/devstack/settings
index 746b2257d7..ab715fc45f 100644
--- a/devstack/settings
+++ b/devstack/settings
@@ -135,7 +135,7 @@ MANILA_SERVICE_INSTANCE_PASSWORD=${MANILA_SERVICE_INSTANCE_PASSWORD:-"manila"}
 MANILA_SERVICE_VM_FLAVOR_REF=${MANILA_SERVICE_VM_FLAVOR_REF:-100}
 MANILA_SERVICE_VM_FLAVOR_NAME=${MANILA_SERVICE_VM_FLAVOR_NAME:-"manila-service-flavor"}
 MANILA_SERVICE_VM_FLAVOR_RAM=${MANILA_SERVICE_VM_FLAVOR_RAM:-320}
-MANILA_SERVICE_VM_FLAVOR_DISK=${MANILA_SERVICE_VM_FLAVOR_DISK:-3}
+MANILA_SERVICE_VM_FLAVOR_DISK=${MANILA_SERVICE_VM_FLAVOR_DISK:-5}
 MANILA_SERVICE_VM_FLAVOR_VCPUS=${MANILA_SERVICE_VM_FLAVOR_VCPUS:-1}
 
 # Enable this option when using a storage backend that is on the same host