Hardware limitations are a problem that are often encountered in any media PC environment. That limit could be a memory capacity or perhaps running out of hard drive bays in your case. Or maybe you're just sick of constantly removing a side panel to swap hard drives. The perfect solution in all the cases above is an internal hard drive rack. These convenient pieces of expansion hardware allow a user to spend a 5.25" bay and convert it to an additional 3.5" hard drive bay. VIZO Technology Corp has sent us their 3.5" contender in the Arius line, the Arius EX, to test.