Seagate has now introduced two generations of their Momentus XT solid state hybrid drive (SSHD) which combined the larger storage capacity of a traditional hard drive with the faster transfer rates of a solid state drive. This fusion of technology offered an improvement over standard drives and moved performance closer to a SSD. The third generation is available now, and Seagate is calling this generation the Laptop SSHD or Laptop Thin SSHD, depending on the thickness of the unit.