Let’s face it, we can never have enough storage space on our hard drives. Current hard drives that use perpendicular magnetic recording technology already have densities of 300-400 GB per square inch, and they are capable of achieving up to 1 terabits per square inch density. The technology is being pushed to the limits and alternatives need to be considered to lift the theoretical density limit.
Hitachi has achieved a density of 2.5 Terabits per square inch with the heat-assisted magnetic recording technology, which has a theoretical limit of up to 50 terabits per square inch. 2.5 Terabits per square inch is 5 times higher than the one currently met in commercial HDDs, which means commercial hard drives with capacities of over 10GB is possible. Unfortunately there is no news on when Hitachi might implement this commercially. For all we know, flash drives might actually improve and render HDDs obsolete.
Shouldn't "300-400 GB" be "300-400 Gb" (B=Bytes, b=bits)?
You're right, sorry about that typo.