diff --git a/tools/regression/geom/Data/disk.msdos.ext.xml b/tools/regression/geom/Data/disk.msdos.ext.xml
index 6e6613ef4d1..868a88f7823 100644
--- a/tools/regression/geom/Data/disk.msdos.ext.xml
+++ b/tools/regression/geom/Data/disk.msdos.ext.xml
@@ -27,6 +27,27 @@
       00000000000000000000000000000000000000000000000000000000000055aa
     </hexdata>
   </sector>
+  <sector>
+    <offset>512</offset>
+    <hexdata>
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+      0000000000000000000000000000000000000000000000000000000000000000
+    </hexdata>
+  </sector>
   <sector>
     <offset>2146798080</offset>
     <hexdata>