perpendicular recording

(redirected from Perpendicular magnetic recording)
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perpendicular recording

[‚pər·pən¦dik·yə·lər ri′kȯrd·iŋ]
(electronics)
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 ?
[5] Perpendicular Magnetic Recording Technologywhite Paper, Hitachi Global Storage Technology, 2011.
While SDK is now mass-producing 2.5- and 3.5-inch sixth- and seventh-generation HD media using perpendicular magnetic recording (PMR) technology[2], the new 2.5-inch HD media we start to ship in March is classified into the eighth-generation of PMR media[3].
Tokyo, Nov 20, 2013 - (JCN Newswire) - Showa Denko (SDK) (TOKYO:4004) has started this month commercial shipments of 2.5-inch hard disk (HD) media with storage capacity of 670 gigabytes per disk, using the seventh-generation perpendicular magnetic recording (PMR) technology.
SDK has commercialized the world's first sixth-generation HD media based on perpendicular magnetic recording technology (2.5-inch 500 GB media; having the world's highest capacity for this size as of December 5, 2102).
We started commercial production of the world's first sixth-generation hard disk media based on perpendicular magnetic recording technology (2.5-inch 500 GB media).
(SDK) has started commercial shipments of 2.5-inch hard disk (HD) media with storage capacity of 500 gigabytes per disk, using the sixth-generation perpendicular magnetic recording (PMR) technology.
We will speedily commercialize the sixth-generation PMR (perpendicular magnetic recording) media, and develop the next-generation SWR (shingled-write recording) media.
(SDK) has started commercial shipments of 2.5-inch hard disk (HD) media with storage capacity of 334 gigabytes per disk, using the fifth-generation perpendicular magnetic recording (PMR) technology.
(SDK) has started commercial shipments of 3.5-inch hard disk (HD) media with storage capacity of 500 gigabytes per disk, using the fourth-generation perpendicular magnetic recording (PMR) technology.
(SDK) has started commercial shipments of 1.89-inch hard disk (HD) media with storage capacity of 120 gigabytes per disk, using the fourth-generation* perpendicular magnetic recording (PMR) technology.
In January, we began commercial shipments of the world's first 1.3-inch HD media with storage capacity of 40 gigabytes per disk, using our perpendicular magnetic recording (PMR) technology.
(SDK) has started commercial shipments of 1.3-inch hard disk (HD) media with storage capacity of 40 gigabytes per disk, using the innovative perpendicular magnetic recording (PMR) technology.