The 750GB Momentus XT Hybrid drive sees a 100% increase in the amount of SLC NAND used when compared to the 500GB gen 2 drive released last year. The capacity has increase by 50%, the interface has changed to a SATA 6Gb/s and comes with new "FAST" factors. All this is great but what happens when the NAND flash fails? Worst case scenario is that the drive acts just like a 7200 RPM mechanical drive. There is no data loss if the NAND fails as the data is written in parallel to both the platters and to the NAND giving some much needed redundancy without a huge performance overhead cost. All the fancy buzz words and technology boil down to an improvement in user experience without the cost, reliability and capacity concerns of an SSD.



Link: OCC