In servers you can take those disk IO (and many other) metrics with telegraf, store them in a local/remote (storing locally may change the disk IO measurements,

In servers you can take those disk IO (and many other) metrics with telegraf, store them in a local/remote (storing locally may change the disk IO measurements, but probably it will be a constant factor) influxdb, and visualize them with Grafana. There are plenty of alternative tools for that, but the point of the article is that helps in the visualization to use a log scale.