This plugin displays instant disk/partition performance (bytes transfered per second) for :
* Build the plugin as a module
Bugs should be reported to the Xfce bug tracking system.
The normal (and best) way to get this plugin is to use the package manager or port system of your operating system.
If it isn't available there, or if you want a different version, you can download it in source form from http://archive.xfce.org/src/panel-plugins/xfce4-diskperf-plugin/.