Monitor disk I/O with Cockpit
Log into Cockpit.
How to test
- Navigate to "Storage" for your machine.
- Copy some big files around on your machine, preferably from one disk to another. Maybe
tar -cf /var/tmp/usr.tar /usr. (You might want to use the Cockpit Terminal for to execute commands like this.)
- Observe the graphs and the "Reading" and "Writing" numbers.
- Hover with your mouse over the graphs.
The page should show the ongoing data transfer. Hovering over a graph should highlight the corresponding disk.