librenms-librenms/html/includes/graphs/diskio/ops.inc.php

<?php

$ds_in  = 'reads';
$ds_out = 'writes';

$colour_area_in  = 'FF3300';
$colour_line_in  = 'FF0000';
$colour_area_out = 'FF6633';
$colour_line_out = 'CC3300';

$colour_area_in_max  = 'FF6633';
$colour_area_out_max = 'FF9966';

$graph_max = 1;

$unit_text = 'Ops/sec';

require 'includes/graphs/generic_duplex.inc.php';