diff --git a/server/fstab.nix b/server/fstab.nix
index 7602bdf..f611c6d 100644
--- a/server/fstab.nix
+++ b/server/fstab.nix
@@ -81,7 +81,13 @@
     "/mnt/disk1" = {
       device = "/dev/mapper/disk1";
       fsType = "btrfs";
-      options = [ "compress=zstd:3" "space_cache=v2" "commit=120" "datacow" ];
+      options = [
+        "subvol=@data"
+        "compress=zstd:3"
+        "space_cache=v2"
+        "commit=120"
+        "datacow"
+      ];
     };
     "/var/lib/nextcloud/data" = {
       device = "/mnt/disk1/nextcloud";
@@ -102,7 +108,13 @@
     "/mnt/disk2" = {
       device = "/dev/mapper/disk2";
       fsType = "btrfs";
-      options = [ "compress=zstd:3" "space_cache=v2" "commit=120" "datacow" ];
+      options = [
+        "subvol=@data"
+        "compress=zstd:3"
+        "space_cache=v2"
+        "commit=120"
+        "datacow"
+      ];
     };
     "/mnt/hnbox" = {
       device = "/dev/mapper/hnbox";