diff --git a/flake.lock b/flake.lock
index 1698b1d..9e35e36 100644
--- a/flake.lock
+++ b/flake.lock
@@ -16,6 +16,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-nyanloutre-pysmart": {
+      "locked": {
+        "lastModified": 1634643555,
+        "narHash": "sha256-Fu0JVScZt0fUqfeo2tsTUcoehtpalBU7+15pxy1Ld+Y=",
+        "owner": "nyanloutre",
+        "repo": "nixpkgs",
+        "rev": "256d8d34f05c8badeaf3ecb615d3af08a4b492d6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nyanloutre",
+        "ref": "pysmart-init",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1634436779,
@@ -50,6 +66,7 @@
     "root": {
       "inputs": {
         "nixpkgs": "nixpkgs",
+        "nixpkgs-nyanloutre-pysmart": "nixpkgs-nyanloutre-pysmart",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "simple-nixos-mailserver": "simple-nixos-mailserver"
       }
diff --git a/flake.nix b/flake.nix
index a586e8b..ac35fd1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,10 +2,11 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-21.05";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-nyanloutre-pysmart.url = "github:nyanloutre/nixpkgs/pysmart-init";
     simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-21.05";
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, simple-nixos-mailserver }: {
+  outputs = { self, nixpkgs, nixpkgs-unstable, simple-nixos-mailserver, nixpkgs-nyanloutre-pysmart }: {
     nixosConfigurations.loutreos = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [
@@ -18,6 +19,23 @@
         "${nixpkgs-unstable}/nixos/modules/services/audio/navidrome.nix"
         simple-nixos-mailserver.nixosModule
         ./systems/LoutreOS/configuration.nix
+        ({ pkgs, ... }: {
+          systemd.services.ipmihddtemp = {
+            description = "IPMI HDD temp fan control";
+            wantedBy = ["multi-user.target"];
+            path = with pkgs;[ ipmitool smartmontools ];
+            serviceConfig = {
+              ExecStart = with nixpkgs-nyanloutre-pysmart.legacyPackages.x86_64-linux;
+              let env = python3Packages.python.buildEnv.override {
+                extraLibs = with python3Packages;[ pysmart ];
+                ignoreCollisions = true;
+              };
+              in "${pkgs.writeShellScriptBin "run.sh" ''
+                ${env}/bin/python ${pkgs.writeScript "ipmihddtemp.py" "${builtins.readFile ./ipmihddtemp.py}"}
+              ''}/bin/run.sh";
+            };
+          };
+        })
       ];
     };
 
diff --git a/ipmihddtemp.py b/ipmihddtemp.py
new file mode 100644
index 0000000..ee7e21f
--- /dev/null
+++ b/ipmihddtemp.py
@@ -0,0 +1,42 @@
+import math
+import subprocess
+import time
+from pySMART import DeviceList
+
+MIN_FAN_SPEED = 30
+MAX_FAN_SPEED = 100
+
+MIN_HDD_TEMP = 30
+MAX_HDD_TEMP = 50
+
+devlist = DeviceList()
+
+# Put fans in full speed mode
+subprocess.run(["ipmitool", "raw", "0x30", "0x45", "0x01", "0x01"])
+
+while True:
+    for device in devlist:
+        device.update()
+
+    # Linear fan speed between MIN_FAN_SPEED and MAX_FAN_SPEED
+    fan_speed = max(
+        min(
+            math.ceil(
+                MIN_FAN_SPEED
+                + (
+                    (MAX_FAN_SPEED - MIN_FAN_SPEED)
+                    * (
+                        (max([x.temperature for x in devlist]) - MIN_HDD_TEMP)
+                        / (MAX_HDD_TEMP - MIN_HDD_TEMP)
+                    )
+                )
+            ),
+            MAX_FAN_SPEED,
+        ),
+        MIN_FAN_SPEED,
+    )
+
+    subprocess.run(["ipmitool", "raw", "0x30", "0x70", "0x66", "0x01", "0x00", hex(fan_speed)])
+
+    time.sleep(10)
+