Disk usage graph in System Monitor is missing
Feature summary
In the System Monitor application it would be nice to add a graph similar to "Memory and Swap" and "Network" which would show the disk read/write speed in time.
There is a console tool iotop which shows the read/write disk speed at the current moment of time. But for me it is not enough: I want to see the disk usage over time, same as I can see the usage of the network in the "Network" pane.
There is also a free tool https://github.com/stolk/diskgraph which allow me to see what I want to see, but this is implemented in console, looks ugly. Would be good to have it in the System Monitor in a nice and consistent look.
How would you like it to work
Ideally it would be nice to have ability to split charts by disks: to allow me to select the disk and see the read and write line charts. Also it would be nice to have total read/write speed charts.
Relevant links, screenshots, screencasts etc.
In Windows there is also an application Resource Monitor https://en.wikipedia.org/wiki/Resource_Monitor which allows to see usage of CPU, RAM, disk and network in time.
In System Monitor only disk chart is missing, the rest is fine.