diff --git a/2025/xg-infra-upgrade-2025.md b/2025/xg-infra-upgrade-2025.md
index d071060..26956f5 100644
--- a/2025/xg-infra-upgrade-2025.md
+++ b/2025/xg-infra-upgrade-2025.md
@@ -97,6 +97,17 @@ root@mango:/data/test-dataset/dataset-1 # zfs list | grep dataset-1
 data/test-dataset/dataset-1   128M   410G   128M  /data/test-dataset/dataset-1
 ```
 
+## ZFS snapshot visibility
+
+```
+# zfs list -t snapshot zpool/data/syncthing/shared/jerry/private
+# zfs get snapdir zpool/data/syncthing/shared/jerry/private
+# zfs set snapdir=hidden zpool/data/syncthing/shared/jerry/private
+```
+
+```
+# zfs set snapdir=visible
+```
 # See also
 
 * [[freebsd-notes]]