Perpendicular-recording meaning

The common method of magnetic disk recording in which vertical bits take up less space than horizontal bits. Also called "vertical recording," Toshiba and Seagate introduced perpendicular recording drives in the 2005-2006 time frame. Other vendors followed, and densities reached 400 gigabits per square inch by 2009. See areal density.A Trillion Bits Per Square InchHeat-assisted magnetic recording (HAMR) combines perpendicular recording with a laser to heat the medium and bumps areal density to more than a trillion bits per square inch (see HAMR). See superparamagnetic limit.
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A technique of creating magnetic data storage using vertical as opposed to longitudinal magnetization. Becoming more common now in laptop hard disk drives.
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