diff --git a/examples/illustrations/partitions/src/partitions-supplemental.json b/examples/illustrations/partitions/src/partitions-supplemental.json
index 87e1ed64..13d216c1 100644
--- a/examples/illustrations/partitions/src/partitions-supplemental.json
+++ b/examples/illustrations/partitions/src/partitions-supplemental.json
@@ -1,4 +1,8 @@
 [
+    {
+        "@id": "kb:Disk-8ad9fa04-cf49-4082-b828-29b7f01f47cb",
+        "@type": "uco-observable:StorageMedium"
+    },
     {
         "@id": "kb:Organization-a94338c2-030a-493f-9d26-55cade656276",
         "@type": "uco-identity:Organization",