diff --git a/releasenotes/notes/attachment-mode-8427aa6a2fa26e70.yaml b/releasenotes/notes/attachment-mode-8427aa6a2fa26e70.yaml
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+---
+features:
+  - |
+    Added the ability to specify the read-write or read-only mode of an
+    attachment starting with microversion 3.54. The command line usage is
+    `cinder attachment-create --mode [rw|ro]`.