desktop: zfs with old drives

etcnixos/flake.lock

@@ -167,11 +167,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1737590910,
-        "narHash": "sha256-qM/y6Dtpu9Wmf5HqeZajQdn+cS0aljdYQQQnrvx+LJE=",
+        "lastModified": 1737751639,
+        "narHash": "sha256-ZEbOJ9iT72iwqXsiEMbEa8wWjyFvRA9Ugx8utmYbpz4=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "9368027715d8dde4b84c79c374948b5306fdd2db",
+        "rev": "dfad538f751a5aa5d4436d9781ab27a6128ec9d4",
         "type": "github"
       },
       "original": {
@@ -183,11 +183,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1737569578,
-        "narHash": "sha256-6qY0pk2QmUtBT9Mywdvif0i/CLVgpCjMUn6g9vB+f3M=",
+        "lastModified": 1737672001,
+        "narHash": "sha256-YnHJJ19wqmibLQdUeq9xzE6CjrMA568KN/lFPuSVs4I=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "47addd76727f42d351590c905d9d1905ca895b82",
+        "rev": "035f8c0853c2977b24ffc4d0a42c74f00b182cd8",
         "type": "github"
       },
       "original": {

etcnixos/system-yarn.nix

@@ -17,18 +17,31 @@
     inputs.nixos-hardware.nixosModules.common-cpu-amd-zenpower
   ];
 
+  networking.hostId = "abf570f9";
   boot = {
+    kernelPackages = lib.mkForce pkgs.linuxPackages;
+
     kernelParams = [
       # allow overclocking (I actually underclock but lol)
       "amdgpu.ppfeaturemask=0xFFF7FFFF"
+
+      # 2048MB
+      "zfs.zfs_arc_max=2048000000"
     ];
 
+    supportedFilesystems = [ "zfs" ];
+    zfs.extraPools = [ "laptop_hdds" ];
+
     kernelModules = [
       # kernel module for case fan control
       "nct6775"
     ];
   };
 
+  systemd.tmpfiles.rules = [
+    "d /laptop_hdds 0755 ${username} users"
+  ];
+
   services.xserver.enable = false;
   services.desktopManager.plasma6.enable = true;
   services.displayManager = {