Consistent capacity growth in hard disk drives (HDDs) has become something people take for granted. It isn’t so trivial if you think about the fact that there are in fact physical limits to how much data you can store on one disk and every now and then they are nearing a limit that can’t be topped anymore. The last limit was hit in 2005 and the next seems to be arriving in the 2013 – 2015 timeframe. However, a new technology breathes new life into HDDs. HAMR will bring massive storage growth and propel the industry far beyond 100 TB.