config/systems/x86_64-linux/earth/disk-config.nix

{
  disko.devices = {
    disk = {
      main = {
        type = "disk";
        device = "/dev/nvme0n1";
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              size = "1G";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = ["umask=0077" "nofail"];
              };
            };
            zfs = {
              size = "100%";
              content = {
                type = "zfs";
                pool = "zroot";
              };
            };
          };
        };
      };
      backup = {
        type = "disk";
        device = "/dev/nvme1n1";
        content = {
          type = "gpt";
          partitions = {
            zbk = {
              size = "100%";
              content = {
                type = "zfs";
                pool = "zbk";
              };
            };
          };
        };
      };
    };
    zpool = {
      zbk = {
        type = "zpool";
        rootFsOptions = {
          acltype = "posixacl";
          atime = "off";
          compression = "zstd";
          mountpoint = "none";
          xattr = "sa";
          autotrim = "on";
        };
        options.ashift = "12";

        datasets = {
          "zbk" = {
            type = "zfs_fs";
            options.mountpoint = "none";
          };
          "zbk/zbk" = {
            type = "zfs_fs";
            mountpoint = "/mnt/zbk";
            options."sharesmb" = "on";
            # Used by services.zfs.autoSnapshot options.
            options."com.sun:auto-snapshot" = "true";
          };
        };
      };
      zroot = {
        type = "zpool";
        rootFsOptions = {
          # https://wiki.archlinux.org/title/Install_Arch_Linux_on_ZFS
          acltype = "posixacl";
          atime = "off";
          compression = "zstd";
          mountpoint = "none";
          xattr = "sa";
          autotrim = "on";
        };
        options.ashift = "12";

        datasets = {
          "local" = {
            type = "zfs_fs";
            options.mountpoint = "none";
          };
          "local/home" = {
            type = "zfs_fs";
            mountpoint = "/home";
            # Used by services.zfs.autoSnapshot options.
            options."com.sun:auto-snapshot" = "true";
          };
          "local/nix" = {
            type = "zfs_fs";
            mountpoint = "/nix";
            options."com.sun:auto-snapshot" = "false";
          };
          "local/persist" = {
            type = "zfs_fs";
            mountpoint = "/persist";
            options."com.sun:auto-snapshot" = "false";
          };
          "local/root" = {
            type = "zfs_fs";
            mountpoint = "/";
            options."com.sun:auto-snapshot" = "false";
            postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot/local/root@blank$' || zfs snapshot zroot/local/root@blank";
          };
        };
      };
    };
  };
}