diff --git a/confluent_server/confluent/messages.py b/confluent_server/confluent/messages.py
index 6f0c3c25..7c6651cd 100644
--- a/confluent_server/confluent/messages.py
+++ b/confluent_server/confluent/messages.py
@@ -1600,6 +1600,7 @@ class Disk(ConfluentMessage):
         'hotspare',
         'rebuilding',
         'online',
+        'offline',
     ])
     state_aliases = {
         'unconfigured bad': 'fault',