diff --git a/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/ExnConnector.java b/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/ExnConnector.java
index d18abcb..176730f 100644
--- a/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/ExnConnector.java
+++ b/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/ExnConnector.java
@@ -52,6 +52,9 @@ public class ExnConnector {
     private static final ObjectMapper mapper = new ObjectMapper();
 
     /** The topic where we listen for app creation messages. */
+    // Note that there is another, earlier app creation message sent via the
+    // channel `eu.nebulouscloud.ui.application.new`, but its format is not
+    // yet defined as of 2024-01-08.
     public static final String app_creation_channel = "eu.nebulouscloud.ui.dsl.generic";
     /** The topic where we listen for app reset messages. */
     public static final String app_reset_channel = "eu.nebulouscloud.optimiser.controller.app_reset";
@@ -227,9 +230,6 @@ public synchronized void stop() {
      * object.  If we already received the performance indicators from the
      * utility evaluator, perform initial deployment; otherwise, wait.
      */
-    // Note that there is another, earlier app creation message sent via the
-    // channel `eu.nebulouscloud.ui.application.new`, but its format is not
-    // yet defined as of 2024-01-08.
     public class AppCreationMessageHandler extends Handler {
         @Override
         public void onMessage(String key, String address, Map body, Message message, Context context) {
diff --git a/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/NebulousAppDeployer.java b/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/NebulousAppDeployer.java
index bd76e39..e594583 100644
--- a/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/NebulousAppDeployer.java
+++ b/optimiser-controller/src/main/java/eu/nebulouscloud/optimiser/controller/NebulousAppDeployer.java
@@ -78,6 +78,8 @@ public static List<Requirement> getControllerRequirements(String jobID, Set<Stri
     public static JsonNode createDeploymentKubevela(JsonNode kubevela) {
         JsonNode result = kubevela.deepCopy();
         for (final JsonNode c : result.withArray("/spec/components")) {
+            // Do not add trait to components that define a volume
+            if (c.at("/type").asText().equals("raw")) continue;
             String name = c.get("name").asText();
             // Add traits
             ArrayNode traits = c.withArray("traits");