diff --git a/devices/nas/default.nix b/devices/nas/default.nix
index a44b857..6eb1075 100644
--- a/devices/nas/default.nix
+++ b/devices/nas/default.nix
@@ -3,6 +3,7 @@
   imports = [
     ./modules/arion
     ./modules/borgbackup.nix
+    ./modules/mergerfs.nix
     ./modules/nfs.nix
   ];
 }
diff --git a/devices/nas/modules/mergerfs.nix b/devices/nas/modules/mergerfs.nix
new file mode 100644
index 0000000..a02cdd1
--- /dev/null
+++ b/devices/nas/modules/mergerfs.nix
@@ -0,0 +1,116 @@
+{
+  config,
+  pkgs,
+  ...
+}: let
+  inherit (config.sops) secrets;
+
+  fsPkgs = with pkgs; [fuse mergerfs sshfs];
+
+  sshfsOpts = [
+    "IdentityFile=${secrets.sshfs.path}"
+
+    "allow_other" # for non-root access
+    "_netdev" # requires network to mount
+    "x-systemd.automount" # mount on demand
+
+    # Handle connection drops better
+    "ServerAliveInterval=15"
+    "reconnect"
+    "defaults"
+  ];
+in {
+  programs.ssh.knownHosts = {
+    "10.0.0.121".publicKey = "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDs4eTQxAU+/B3B3AYXbTeRIZGk6lUKlykWrZZ07r3NMIJkleEE7i5KgW8QeeWVLFG8Thi4jyVferM7tPILA//Q6GXNDQ3ioYHExG33d/yIRGStD3rEizAv0LkDHavZ33VDNEOkBLQ22eeB7cCaQvsUoCbryo6w3mSQO5PDH9RE44XrOaSCbLvjhst5Z9gXPtrJsBcvOFUpdwz5gIHIqTFo6fQpmzxYkY5GrMaqMB75Xh2MQNkIZteC2MMPgIH9Vz+Q3CnzyiXEzoYaUtT0//sXnydagWWt9xf+KJ34Oz0r1Jtn2ihgJZmA7NrO5zATZVq6qQHdhry3xL1PpvY7U5Zx";
+  };
+
+  system.fsPackages = fsPkgs;
+  environment.systemPackages = fsPkgs;
+
+  fileSystems = {
+    "MergerFS Data" = {
+      mountPoint = "/data";
+      fsType = "fuse.mergerfs";
+      device = "/mnt/drives/?tb*";
+      options = [
+        "cache.files=partial"
+        "allow_other"
+        "category.create=lfs"
+        "minfreespace=50G"
+        "fsname=mergerfs"
+      ];
+    };
+
+    "3tb-1" = {
+      mountPoint = "/mnt/drives/3tb1";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/3tb-1";
+      # device = "/dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N1236473-part1";
+    };
+
+    "3tb-2" = {
+      mountPoint = "/mnt/drives/3tb2";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/3tb-2";
+      # device = "/dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N1233153-part1";
+    };
+
+    "4tb-1" = {
+      mountPoint = "/mnt/drives/4tb1";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/4tb-1";
+      # device = "/dev/disk/by-id/ata-WDC_WD40EZAZ-19SF3B0_WD-WX32D81DE8RD-part1";
+    };
+
+    "4tb-2" = {
+      mountPoint = "/mnt/drives/4tb2";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/4tb-2";
+      # device = "/dev/disk/by-id/ata-WDC_WD40EZAZ-19SF3B0_WD-WX32D81DE6Z0-part1";
+    };
+
+    "8tb-1" = {
+      mountPoint = "/mnt/drives/8tb1";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/8tb-1";
+      # device = "/dev/disk/by-id/ata-WDC_WD8003FFBX-68B9AN0_VAJ99UDL-part1";
+    };
+
+    "8tb-2 parity0" = {
+      mountPoint = "/mnt/drives/parity0";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/parity0";
+      # device = "/dev/disk/by-id/ata-WDC_WD8003FFBX-68B9AN0_VDGL4HZD-part1";
+    };
+
+    "8tb-3 parity1" = {
+      mountPoint = "/mnt/drives/parity1";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/parity1";
+      # device = "/dev/disk/by-id/ata-WDC_WD80EFZZ-68BTXN0_WD-CA13WUYK-part1";
+    };
+
+    "8tb-4" = {
+      mountPoint = "/mnt/drives/8tb4";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/8tb-4";
+      # device = "/dev/disk/by-id/ata-WDC_WD80EAZZ-00BKLB0_WD-CA1AVU7K-part1";
+    };
+
+    "8tb-5" = {
+      mountPoint = "/mnt/drives/8tb5";
+      fsType = "sshfs"; # "ext4";
+      options = sshfsOpts;
+      device = "root@10.0.0.121:/drives/8tb-5";
+      # device = "/dev/disk/by-id/ata-WDC_WD80EAZZ-00BKLB0_WD-CA1GN0GK-part1";
+    };
+  };
+}
diff --git a/flake.lock b/flake.lock
index 10693fa..40f25b1 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1274,11 +1274,11 @@
         "sops-nix": "sops-nix"
       },
       "locked": {
-        "lastModified": 1708231529,
-        "narHash": "sha256-BAYVOr3jmamIAR8E/PZxcSM33do0JCsUFiuMO04HRXQ=",
+        "lastModified": 1708281692,
+        "narHash": "sha256-MwEtc7/Q9zOAXkN90mJB19spwDJg1wKq9QE27EQ47Kk=",
         "ref": "refs/heads/main",
-        "rev": "98afa3adce5e38f91f9c733c154784aabbba00d5",
-        "revCount": 40,
+        "rev": "82e860c8bd9a3c634e73478fd0dd537f09c48c97",
+        "revCount": 41,
         "type": "git",
         "url": "ssh://git@git.nelim.org/matt1432/nixos-secrets"
       },