I am running Ubuntu 12.10 and have noticed that my hard drive is constantly flicking on without stopping. This seems rather unusual and want to know if there is anything that can be done to make it stop. I have a browser open with several tabs. I have gmail in one tab, St George Bank in another tab, Facebook, Google+ and Telstra in another tab. Does anyone have a similar experience and what can be done about the hard drive constantly flickering.