disk.nix

{
  disko.devices = {
    disk = {
      main = {
        type = "disk";
        device = "/dev/disk/by-id/nvme-KINGSTON_OM8PDP3256B-AB1_50026B768583ADF8";
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              size = "2G";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
              };
            };
            zfs = {
              size = "100%";
              content = {
                type = "zfs";
                pool = "zroot";
              };
            };
          };
        };
      };
    };
    zpool = {
      zroot = {
        type = "zpool";
        rootFsOptions = {
          # https://wiki.archlinux.org/title/Install_Arch_Linux_on_ZFS
          acltype = "posixacl";
          atime = "off";
          compression = "zstd";
          mountpoint = "none";
          xattr = "sa";
        };
        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";
            # options."dedup" = "on";
          };
          "local/root" = {
            type = "zfs_fs";
            mountpoint = "/root";
            options."com.sun:auto-snapshot" = "true";
            # options."dedup" = "on";
          };
          "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";
            # options."dedup" = "on";
          };
          "ROOT" = {
            type = "zfs_fs";
            mountpoint = "/";
            options."com.sun:auto-snapshot" = "false";
            postCreateHook = "zfs snapshot zroot/ROOT@blank";
          };
          # refreservation=10G -o mountpoint=none zroot/reserved
          "reserved" = {
            type = "zfs_fs";
            options.mountpoint = "none";
            options."refreservation" = "10G";
          };
        };
      };
    };
  };
}