Ceatec 2013 Japan : Tdk Heat - Assisted Magnetic Recording Boosts Hdd Capacity (hamr)

CEATEC 2013 Japan : TDK Heat-Assisted Magnetic Recording Boosts HDD Capacity (HAMR)At CEATEC Japan, TDK was demonstrating HAMR (heat-assisted magnetic recording), a technology designed to dramatically increase the data density of mechanical hard drives. Hard drives are typically limited by how much bits of information they can safely store per square inch of each platter surface (HDDs can feature many platters or disks).
Since the information is saved as a magnetic polarity, attempting to pack too much information in a tight space may result in weird analog interferences that ends up breaking down individual bits of information and effectively corrupt the data.
TDK has found that magnetic surfaces used in hard drives react differently at higher temperatures, and that by heating the disk surface, they were able to safely pack more information per square inch. To do that, they use a laser that heats up the surface ahead of the magnetic write/read head so that the surface comes at the ideal writing temperature when the HDD head is right on top of it. The challenge is to find the right balance of heating/cooling speed, without inducing any damage to the platter. That’s exactly what TDK claims to have done.