diff --git a/nixos/hosts/osaka-vultr-01/disks.nix b/nixos/hosts/osaka-vultr-01/disks.nix
index 4394df17..e58f58b6 100644
--- a/nixos/hosts/osaka-vultr-01/disks.nix
+++ b/nixos/hosts/osaka-vultr-01/disks.nix
@@ -23,23 +23,10 @@
             name = "crypted";
             extraOpenArgs = [ "--allow-discards" ];
             content = {
-              type = "btrfs";
-              extraArgs = [ "-f" ];
-              subvolumes = {
-                "/root" = {
-                  mountpoint = "/";
-                  mountOptions = [ "compress=zstd" "noatime" ];
-                }; # root
-                "/home" = {
-                  mountpoint = "/home";
-                  mountOptions = [ "compress=zstd" "noatime" ];
-                }; # home
-                "/nix" = {
-                  mountpoint = "/nix";
-                  mountOptions = [ "compress=zstd" "noatime" ];
-                }; # nix
-              }; # subvolumes
-            };# content
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+            }; # content
           }; # content
         }; # luks.partitions
       }; # partitions