diff --git a/hosts/nas/configuration.nix b/hosts/nas/configuration.nix
index 109c2ef..d07c2e5 100644
--- a/hosts/nas/configuration.nix
+++ b/hosts/nas/configuration.nix
@@ -50,13 +50,12 @@ in {
   };
 
   # Impermanence - persist important directories
+  # Note: /var/lib/downloads and /var/lib/multimedia are mounted from LVM on RAID
   environment.persistence."/nix/persist/system" = {
     hideMounts = true;
     directories = [
       "/var/lib/pyload"
       "/var/lib/jellyfin"
-      "/var/lib/downloads"
-      "/var/lib/multimedia"
       "/var/log"
       "/var/lib/nixos"
       "/var/bento"
diff --git a/hosts/nas/hardware-configuration.nix b/hosts/nas/hardware-configuration.nix
index ed15d9d..a3c3edd 100644
--- a/hosts/nas/hardware-configuration.nix
+++ b/hosts/nas/hardware-configuration.nix
@@ -12,10 +12,19 @@
   };
   boot.loader.efi.canTouchEfiVariables = true;
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usb_storage" "sd_mod" ];
-  boot.initrd.kernelModules = [ ];
+  boot.initrd.kernelModules = [ "dm-snapshot" ];
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
 
+  # RAID 1 array for data storage
+  boot.swraid = {
+    enable = true;
+    mdadmConf = ''
+      DEVICE /dev/disk/by-id/ata-ST18000NM000J-2TV103_ZR52TBSB-part1
+      DEVICE /dev/disk/by-id/ata-ST18000NM000J-2TV103_ZR52V9QX-part1
+    '';
+  };
+
   # Tmpfs root filesystem (ephemeral - resets on reboot)
   fileSystems."/" = {
     device = "none";
@@ -65,6 +74,17 @@
     ];
   };
 
+  # LVM volumes on RAID array
+  fileSystems."/var/lib/downloads" = {
+    device = "/dev/vg-data/lv-downloads";
+    fsType = "xfs";
+  };
+
+  fileSystems."/var/lib/multimedia" = {
+    device = "/dev/vg-data/lv-multimedia";
+    fsType = "xfs";
+  };
+
   # DHCP networking
   networking.useDHCP = lib.mkDefault true;