{ lib, ... }:

# Second disk for db-host: the Postgres data directory lives on /dev/sdb, kept
# separate from the OS disk (/dev/sda). The whole disk is one GPT partition,
# ext4, mounted at /var/lib/postgresql — so the cluster data dir
# (/var/lib/postgresql/17, the upstream NixOS default) sits on this drive and
# survives an OS-disk rebuild.
{
  disko.devices.disk.disk2 = {
    device = lib.mkDefault "/dev/sdb";
    type = "disk";
    content = {
      type = "gpt";
      partitions = {
        data = {
          name = "data";
          size = "100%";
          content = {
            type = "filesystem";
            format = "ext4";
            mountpoint = "/var/lib/postgresql";
            mountOptions = [ "defaults" ];
          };
        };
      };
    };
  };
}