- Tech know how online

longitudinal magnetic recording (LMR)

Longitudinal Magnetic Recording (LMR) is the classic magnetization method for hard disks, which dates back to the 1960s and in which the data is stored horizontally on the hard disk.

In the meantime, other processes have been developed with which the storage density of hard disks can be significantly increased. Perpendicular Magnetic Recording( PMR), in which the data is stored perpendicular to the magnetic surface, and Shingled Magnetic Recording( SMR), in which the track positions are optimized, should be mentioned here.

Principle of Longitudinal Recording (LMR)

Principle of Longitudinal Recording (LMR)

In Longitudinal Magnetic Recording, magnetization occurs in the horizontal direction in accordance with the rotation of the hard disk. The magnetic fields of adjacent data bits with opposite magnetization are separated from each other by a transition region. The longitudinal method has been improved over the years and, in terms of storage density, reached its limits years ago. With this method, storage densities between 100 and 200 Gbit per square inch can be achieved with superparametric effects.

Englisch: longitudinal magnetic recording - LMR
Updated at: 03.09.2015
#Words: 161
Links: method, data, hard disk (HD), indium (In), storage density
Translations: DE

All rights reserved DATACOM Buchverlag GmbH © 2022