vertical recording

vertical recording

[′vərd·ə·kəl ri′kȯrd·iŋ]
Magnetic recording in which bits are magnetized in directions perpendicular to the surface of the recording medium, allowing the bits to be smaller. Also known as perpendicular recording.
(engineering acoustics)
A type of disk recording in which the groove modulation is perpendicular to the surface of the recording medium, so the cutting stylus moves up and down rather than from side to side during recording. Also known as hill-and-dale recording.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

perpendicular recording

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 Inch
Heat-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.

Perpendicular (Vertical) Recording
The magnetic flux coming out of the write pole (P2) affects the vertical bit directly below. It goes down to the soft underlayer and back up the return pole (P1).

Longitudinal (Horizontal) Recording
Before the perpendicular method, the bits were written horizontally on the disk platter. (Assistance with these illustrations courtesy of Hitachi Global Storage Technologies.)
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References in periodicals archive ?
Hitachi Global Storage, a major disc drive manufacturer, will commercialize 2.5" and 1.8" drives with vertical recording systems in the second half of 2006.
Alps realized even higher recording density for the recording surface of the write head through the use of the vertical recording system that has been proven to boost recording density, and by shifting from the previous longitudinal system to the perpendicular system.
The timing electronics of the laser receiver allow a vertical recording resolution of 0.05m (2in) for a single measurement.