anchor.diff:      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."/boot" = {
  +    device = "/dev/disk/by-id/nvme-Samsung_SSD_970_EVO_1TB_S5H9NS1NB18061Z-part1";
  +    fsType = "vfat";
  +  };
  +
     fileSystems."/" = {
       device = "rpool/safe/root";
       fsType = "zfs";
  
positive.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 = [ ];
  
negative.code:     fsType = "zfs";
    };
  
    fileSystems."/home/ch1bo/backup" = {
      device = "backup/ch1bo";
      fsType = "zfs";
    };
  
    swapDevices = [{ device = "/dev/mapper/swap"; }];
  
    powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
    # high-resolution display
    hardware.video.hidpi.enable = lib.mkDefault true;
  }
  