diff --git a/hosts/FredOS-Mediaserver.nix b/hosts/FredOS-Mediaserver.nix
index 8fda68e..73ac8ee 100644
--- a/hosts/FredOS-Mediaserver.nix
+++ b/hosts/FredOS-Mediaserver.nix
@@ -17,9 +17,14 @@
       fsType = "ext4";
     };
 
+    fileSystems."/mnt/disk4" = {
+      device = "/dev/disk/by-uuid/3d1206be-7989-4fb7-aac3-2888d7363e53";
+      fsType = "ext4";
+    };
+
     # The Combined MergerFS Pool
     fileSystems."/mnt/storage" = {
-      device = "/mnt/disk1:/mnt/disk2:/mnt/disk3";
+      device = "/mnt/disk1:/mnt/disk2:/mnt/disk3:/mnt/disk4";
       fsType = "fuse.mergerfs";
       options = [
         "defaults"
@@ -67,7 +72,7 @@
     boot.loader.grub = {
       enable = true;
       # Includes all 4 physical disks for redundancy
-      devices = [ "/dev/sda" "/dev/sdb" "/dev/sdc" "/dev/sdd" ];
+      devices = [ "/dev/sda" "/dev/sdb" "/dev/sdc" "/dev/sdd" "/dev/sde" ];
       useOSProber = true;
     };
   };