diff --git a/nova/volume/storage.py b/nova/volume/storage.py
index cf64b995ff..c2affe3ee9 100644
--- a/nova/volume/storage.py
+++ b/nova/volume/storage.py
@@ -243,9 +243,12 @@ class FakeVolume(Volume):
         pass
 
 def get_next_aoe_numbers():
-    aoes = glob.glob("/var/lib/vblade-persist/vblades/e*")
-    aoes.extend(['e0.0'])
-    blade_id = int(max([int(a.split('.')[1]) for a in aoes])) + 1
-    logging.debug("Next blade_id is %s" % (blade_id))
+    aoes = subprocess.Popen("sudo ls -1 /var/lib/vblade-persist/vblades/", shell=True, stdout=subprocess.PIPE).communicate()[0]
+    last_aoe = aoes.strip().split("\n")[-1]
+    if last_aoe == '':
+        last_aoe = 'e0.0'
+    logging.debug("Last aoe is %s" % (last_aoe))
+    blade_id = last_aoe.rpartition(".")[2]
     shelf_id = FLAGS.shelf_id
+    blade_id = int(blade_id) + 1
     return (shelf_id, blade_id)