Fixed if statement. Added separate disk-spindown file.

config-files/disks/snapraid.nix

@@ -1,7 +1,6 @@
 { config, lib, ... }:
 
 let
-
 ### --> SnapRAID disks research
   contentDiskMounts = lib.attrsets.attrNames (
     lib.attrsets.filterAttrs (name: value: lib.strings.hasPrefix "/mnt/content-" name) config.fileSystems
@@ -14,15 +13,8 @@ let
     { i = 0; }
     contentDiskMounts;
 ### SnapRAID disks research <--
-
-### --> Spindown disks
-  hardDrives = [ ${DISK_ID_LIST[@]} ];
-### Spindown disks <--
 in
 
-
-
-
 ### --> MergerFS setup
 {
   fileSystems."/mnt/data-storage" = {
@@ -40,8 +32,6 @@ in
   };
 ### MergerFS setup <--
 
-
-
 ### --> SnapRAID setup
   services.snapraid = {
     enable = true;
@@ -51,22 +41,4 @@ in
   };
 ### SnapRAID setup <--
 
-
-
-### --> Disk spindown
-  systemd.services.hd-idle = {
-    description = "External HD spin down daemon";
-    wantedBy = [ "multi-user.target" ];
-    serviceConfig = {
-      Type = "simple";
-      ExecStart =
-        let
-          idleTime = toString 1800;
-          hardDriveParameter = lib.strings.concatMapStringsSep " " (x: "-a ${x} -i ${idleTime}") hardDrives;
-        in
-        "${pkgs.hd-idle}/bin/hd-idle -i 0 ${hardDriveParameter}";
-    };
-  };
-### Disk spindown <--
-
 }

config-files/disks/spindown.nix

@@ -0,0 +1,17 @@
+{ config, pkgs, lib, ... }:
+
+### --> Disk spindown
+  systemd.services.hd-idle = {
+    description = "External HD spin down daemon";
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      Type = "simple";
+      ExecStart =
+        let
+          idleTime = toString 1800;
+          hardDriveParameter = lib.strings.concatMapStringsSep " " (x: "-a ${x} -i ${idleTime}") hardDrives;
+        in
+        "${pkgs.hd-idle}/bin/hd-idle -i 0 ${hardDriveParameter}";
+    };
+  };
+### Disk spindown <--