News Today, and Hypercritical. Exactly. If the physical hard drive craps out one can just replace it with a standard one off the shelf, or upgrade at will. They are actually separate. It's the way Mac OS Mountain Lion's Fusion Drive software takes advantage of the whole thing that is amazing. What Windows Vista and Windows 7 utilized was a "hybrid hard disk drive" (H-HDD) a type of large-buffer computer hard disk drive. In 2010 Seagate released the Momentus XT, which uses so-called "adaptive memory" for its SSD portion, which is not reliant on driver support from the operating system. This removes the need for a special operating system, and the speed benefits can be used by any OS. Not the same. Fusion Drive tech allows for the entire OS and heavily used apps like Adobe CS or FinalCut Pro to be stored and run from integrated flash memory for instant access.