Hi.
Iguess you talking about this one http://www.gadgetreview.com/wp-content/uploads/2011/04/WDBABV5000ABK-NESN.jpg
In the case that the enclosure have failed and not the hdd then you can open the enclosure and install the hdd on a pc or on another enclosure. Now if the hdd failed then you need to rma the think. BEFORE YOU DO ANYTHING CHECK YOUR WARRANTY <---sorry for caps . have a nice day.