anchor.diff:      fsType = "zfs";
     };
   
  -
     fileSystems."/home/ch1bo/backup" = {
       device = "backup/ch1bo";
       fsType = "zfs";
     };
   
  -  swapDevices =
  -    [{ device = "/dev/mapper/swap"; }];
  +  swapDevices = [{ device = "/dev/mapper/swap"; }];
   
  -  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
  +  powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
     # high-resolution display
     hardware.video.hidpi.enable = lib.mkDefault true;
   }
  
positive.code:     backup2 = { device = "/dev/disk/by-id/ata-WDC_WD1001FALS-00J7B1_WD-WMATV2744001"; };
    };
  
    fileSystems."/boot" =
      {
        device = "/dev/disk/by-id/nvme-Samsung_SSD_970_EVO_1TB_S5H9NS1NB18061Z-part1";
        fsType = "vfat";
      };
    fileSystems."/" = {
      device = "rpool/safe/root";
      fsType = "zfs";
  
negative.code: { config, lib, pkgs, modulesPath, ... }:
  
  {
    imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
  
    boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "sd_mod" ];
    boot.initrd.kernelModules = [ ];
  