diff --git a/2025/xg-infra-upgrade-2025.md b/2025/xg-infra-upgrade-2025.md
index 18f22ca..6b5f79c 100644
--- a/2025/xg-infra-upgrade-2025.md
+++ b/2025/xg-infra-upgrade-2025.md
@@ -39,6 +39,7 @@ Host OS services:
  * SSH + sshguard
 
 Improvements & things to not forget:
+* ZFS disable atime https://www.unixtutorial.org/zfs-performance-basics-disable-atime/
 * backup settings from /etc and /usr/local/etc before SSD OS disk wipe
 * private keychains daily snapshots (separate Syncthing share + copies=2?)
 * Syncthing