Seagate Confirms Plans for 12 TB HDD in Near Future, 16 TB HDD Due in 2018
 

The CEO of Seagate has confirmed plans to release new nearline harddrives with 12 TB capacity in the coming months, and HDDs with 16 TB capacity over the course of the next several quarters. The latter are believed to be based on HAMR technology and the comment by the CEO essentially means that the company is on track with its next generation of heat assisted magnetic recording technology.
http://www.anandtech.com/show/11084/...dd-due-in-2018