get eyesis4pi free space

    die(symlink($mountpoint,$symlink));

    break;

  case "free_space":

    //sda1

    if (is_dir($mountpoint)) $sda1 = round(disk_free_space($mountpoint)/1024/1024/1024,2);

    //sda2

    if (!is_file($camogmdisk)){

      $devices = get_raw_dev();

      foreach($devices as $device=>$size){

        //size in MB

        if ($device=="/dev/sda2") $sda2 = round($size/1048576,2);

      }

    }else{

      //read camogm.disk file

      $sda2 = 10;

    }

    respond_xml("{$sda1}G {$sda2}G");

    break;

  case "free_space_bkp":

    // results are in GB

    // /dev/sda2 is not a mountpoint but a device because it does not have a file system

    $res = 0;