diff --git a/files/initrd/opt/rr/model-configs/HD6500.yml b/files/initrd/opt/rr/model-configs/HD6500.yml
index 26f48df3..ede7230b 100644
--- a/files/initrd/opt/rr/model-configs/HD6500.yml
+++ b/files/initrd/opt/rr/model-configs/HD6500.yml
@@ -34,6 +34,7 @@ platform: "purley"
 unique: "synology_purley_hd6500"
 serial:
   prefix:
+    - "20A0"
     - "21C0"
   middle: "RUR"
   suffix: "alpha"