MOMENTUS XT PHYSICAL CHARACTERISTICS
The Seagate Momentus XT Solid State Hybrid Drive does not really have anything unique in the looks department. The drive looks essentially identical to other 2.5 drives:
For a size comparison, here is the Momentus XT paired next to a Motorola Grasp WX404 and an OCZ Vertex 2 60Gb SSD respectively:
The underside of the drive is where we see the true meaning of hybrid. Both platter and SSD outlines are present. For the SSD cache, an 8GB Single-Layer Cell (SLC) NAND flash memory rests by two disk platters, which have a rotational speed of 7200 RPM while being combined with 32MB of DRAM buffer memory:
The Momentus XT is termed as a Solid State Hybrid Drive, but it leans more towards the hard drive side than the SSD side. The size is a giveaway in itself, but there is another really innovative feature. If the 8Gb SLC SSD cache malfunctions, the Momentus XT will continue to operate as a normal hard drive. Additionally, the data will remain intact regardless, which speaks highly of its reliability and durability.
What makes this marriage between tradition hard drive and SSD work is complex, but one of the main contributors is Seagate’s F.A.S.T. Factor Technology which will be outlined next.