This is a brand new OWC SSD 120GB SATA 6.0Gb/s Solid-State Drive for the Macbook and Macbook Pro models. These are asynchronous drives with a 6GB transfer rate.
Why Solid State:
Solid state drives have several advantages over the magnetic hard drives. The majority of this comes from the fact that the drive does not have any moving parts. While a traditional drive has drive motors to spin up the magnetic platters and the drive heads, all the storage on a solid state drive is handled by flash memory chips. This provides three distinct advantages: * Less Power Usage * Faster Data Access * Higher Reliability