I had a problem in Windows 8 where my hard-drive activity was reaching 100% all the time and the system was very slow. Now I've switched to Ubuntu Gnome and want to check if this is still a problem on Ubuntu. Is there a way to check this?
I am not looking for how much space I have on my HDD! I know how to find CPU and RAM usage as well. I am looking to find out the disk activity of my drive. For example, using Windows Task Manager it reports the disk activity as 0.04%. This is what I am looking for: