While SMR technology has increased bit density on disk drive platters by 25% or more, to about 1Tbit per square inch, HAMR technology will increase it to 5Tbits per square inch, Re said.
By comparison, in March 2005, Hitachi Global Storage Technologies (HGST) demonstrated an areal density of 230 gigabits per square inch (Gb/in2) on what was then its new perpendicular recording technology.
By 2021, HGST is expected be shipping higher-density disks using BPMR, which uses nanolithography to break magnetic media down into small regions or bit "islands" on a platter's surface. Bits, which are typically made up of 20 magnetic grains, can then be reduced in size without risk of the superparamagnetic effect.
According to the Advanced Storage Technology Consortium's roadmap, BPMR will later be joined with HAMR technology, leading to Heated Dot Magnetic Recording.
Sign up for CIO Asia eNewsletters.