The system load indicators included for the panel does not seem to be able to monitor the hard disks (reports 0% use). Processor, network, memory & load average all seem to work fine.

"System Monitor" Panel Applet

wolfman 3 August 2016 13:20 9

try opening Synaptic (install if necessary) and firstly change your software sources download location, then search for mate-system-monitor and then right click it and mark for re-installation!.

Terminal install command (Ctrl + Alt + t) as follows:

sudo apt-get install synaptic