perpendicular recording

(redirected from Perpendicular magnetic recording)
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perpendicular recording

[‚pər·pən¦dik·yə·lər ri′kȯrd·iŋ]
(electronics)

perpendicular recording

A method of digital recording on a magnetic disk in which the bits are in a vertical arrangement instead of horizontal in order to take up less space. Also called "vertical recording," Toshiba and Seagate introduced perpendicular recording drives in the 2005-2006 time frame. Other drive vendors followed, and areal densities reached 400 gigabits per square inch by 2009.

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 a trillion bits per square inch (see HAMR). See superparamagnetic limit and areal density.


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







Longitudinal (Horizontal) Recording
Prior to the perpendicular method, the bits were written horizontally on the recording surface of the disk platter. (Assistance with these illustrations courtesy of Hitachi Global Storage Technologies.)
References in periodicals archive ?
Following WD's growing investments in technology the past five years, the company achieved 520 Gb/in2 using its own perpendicular magnetic recording (PMR)/tunneling magneto-resistive (TuMR) head technology.
Engineered using perpendicular magnetic recording (PMR) technology, the 5400RPM 2.
8-inch form factor, using perpendicular magnetic recording (PMR) technology, which Toshiba introduced and commercialized in 2005.
89-inch hard disk (HD) media with storage capacity of 120 gigabytes per disk, using the fourth-generation* perpendicular magnetic recording (PMR) technology.
5-inch disc drive on the strength of second-generation perpendicular magnetic recording technology.
Proven perpendicular magnetic recording (PMR) technology helps to ensure maximum stability, reliability and data integrity
3-inch hard disk (HD) media with storage capacity of 40 gigabytes per disk, using the innovative perpendicular magnetic recording (PMR) technology.
New WD Caviar(R) Hard Drive Implements Perpendicular Magnetic Recording (PMR) Technology
89-inch hard disk (HD) media with storage capacity of 80 gigabytes per disk, using the innovative perpendicular magnetic recording (PMR) technology.
New 250 GB WD Scorpio(TM) Drives Are WD's Second Generation Employing Perpendicular Magnetic Recording Technology
5-inch hard disk (HD) media with storage capacity of 334 gigabytes per disk, using the innovative perpendicular magnetic recording (PMR) technology.
5 /PRNewswire-FirstCall/ -- Vaulting to a clear leadership position with the new technology that brings soaring storage capacities to computers and consumer electronics devices, Seagate Technology today announced that it has become the first company to break the 15 million mark in shipments of hard drives built on a perpendicular magnetic recording (PMR), shipping more than 16 million of the drives.