Longitudinal & Perpendicular Recording

Perpendicular Recording

• Perpendicular recording or Perpendicular Magnetic Recording, PMR is a technology where the recording of data for a hard disk.

• Perpendicular recording has more advantages over the longitudinal recording. Perpendicular recording can store up to 3 times the amount of storage in comparison to longitudinal recording hard disks.

• Perpendicular recording uses higher coercivity materials because the head's write field penetrates the medium more efficiently in the perpendicular geometry.

• Perpendicular recording has larger storage capacity because it aligns the poles of the magnetic elements, which

Longitudinal Recording

• Longitudinal recording is the common method of digital recording of data on a magnetic material where the bits are laid out end to end and the direction of the magnetic charge is horizontal with respect to the medium.

• Its storage capacity is less advantageous in comparison to perpendicular recording because of the nature of the disk.

• The arrangement of the bits are different in arrangement in a way making it less efficient compare to perpendicular recording disks because of using lesser bits compared to perpendicular recording disks.

• It also lacks the underlayer which perpendicular recording disks use.