diff --git a/2025/xg-infra-srvc1-upgrade-2025 1.md b/2025/xg-infra-srvc1-upgrade-2025 1.md
index 6826fbf..194cf02 100644
--- a/2025/xg-infra-srvc1-upgrade-2025 1.md	
+++ b/2025/xg-infra-srvc1-upgrade-2025 1.md	
@@ -26,4 +26,5 @@ See information
 
 * https://wiki.archlinux.org/title/Btrfs
 * https://docs.docker.com/engine/install/debian/
-* https://docs.docker.com/engine/storage/drivers/btrfs-driver/
\ No newline at end of file
+* https://docs.docker.com/engine/storage/drivers/btrfs-driver/
+* https://man.archlinux.org/man/btrfs.5#MOUNT_OPTIONS
\ No newline at end of file