Ive just installed smcFanControl , and can now see my iMac's optical drive speed and temperature at the top of the window, does any one know how I can get the hard drive speed and temperature to show instead ?
I think the ODD speed is the one shown on the top by default and i don't think it can be changed i it could it would be in the preferences (Right click on the Temp). I had this problem and have not found a solution although i now use iStat Pro which can tell you all the fan speed and temperatures easily in the dashboard.
Sorry i can't help more.