Hi, I discovered the very useful (and acurate) Tool SMART-UTILITY. http://www.volitans-software.com/smart_utility.php (look at the screen shots to understand, why I like this programm so much). Unfortunately after 5 times of using it costs something. (I tried SMART Reporter and checked the same disk with SMART UTILITY, SMART Reporter said in good health and did not detect the defective sectors S.U. had found). So I wanted to try this one: http://sourceforge.net/apps/trac/smartmontools/wiki/Download It seems one has to put together his/her own package and install two components to use it and one has to know what to type in the terminal. CAN SOMEONE walk me through installation and advice me how to use it? Thank you! PS: macupdate.com suggests this one http://sixtyfive.xmghosting.com/products/smartctl/ which I installed a while ago, but simply clicking on the symbol causes the programm to be shown in the Finder-bar, but I can cause no action.