diff --git a/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java b/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java
index 2865e56fd30..a8557c1c3f1 100644
--- a/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java
+++ b/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java
@@ -1149,7 +1149,7 @@ public abstract class CitrixResourceBase implements ServerResource, HypervisorRe
             vbdr.unpluggable = (volume.getType() == Volume.Type.ROOT) ? false : true;
             vbdr.userdevice = "autodetect";
             final Long deviceId = volume.getDiskSeq();
-            if (deviceId != null && !isDeviceUsed(conn, vm, deviceId)) {
+            if (deviceId != null && (!isDeviceUsed(conn, vm, deviceId) || deviceId > 3)) {
                 vbdr.userdevice = deviceId.toString();
             }
         }