perpendicular recording

"Now it's time for perpendicular recording so that industry can keep making advances."

This was half of the density achieved via perpendicular recording at that time.

It is expected that perpendicular recording technology can scale to about 1 Tbit/in2 at its maximum.

This was the first Seagate product family to implement perpendicular recording for higher capacities.

Most methods in use today have a limit of a few hundred gigabytes per square inch thanks to perpendicular recording.

Perpendicular recording is predicted to allow information densities of up to around 1 Tbit/sq.

Current hard disk technology uses perpendicular recording.

Perpendicular recording can deliver more than three times the storage density of traditional longitudinal recording.

Hitachi has increased data density on harddrives to 230 Gigabit per square inch using perpendicular recording.

In 2005 Toshiba introduced a new hard drive using perpendicular recording, which features a density of 179 Gbit/in2.

Now, however, longitudinal recording is reaching fundamental limits, and so the storage industry is preparing to make the transition to perpendicular recording.

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

(see perpendicular recording).

ED - Extended density (Perpendicular recording)

Perpendicular recording (or Perpendicular Magnetic Recording, PMR) is a technology for data recording on hard disks.

The technology, known as perpendicular recording because the tiny magnets that represent digits are placed upright, not end to end, has been anticipated by the magnetic storage industry for more than two decades.

TMR has now replaced GMR in MRAMs and disk drives, in particular for high area densities and perpendicular recording.

The limitation of Perpendicular recording is often characterised by the competing requirements of Readability, Writeability and Stability commonly known as the Magnetic Recording Trilemma.

Another technology used to overcome thermal effects to allow greater recording densities is perpendicular recording, first shipped in 2005, and as of 2007 the technology was used in many HDDs.

In theory the technology offers storage densities on the order of 1 Tbit/in2, far greater than even the best hard drive technologies currently in use (perpendicular recording offers about 230 Gbit/in2) .

Perpendicular recording was first used by Toshiba in 3.5" floppy disks to permit 2.88 MB of capacity (ED or extended density), but they failed to succeed in the market place.

Perpendicular recording involved an engineering feat on the part of the industry, which had to redesign both the platters on which the data is stored and the microscopic recording heads that read and write the magnetic ones and zeros.

The popular explanation for the advantage of perpendicular recording is that it achieves higher storage densities by aligning the poles of the magnetic elements, which represent bits, perpendicularly to the surface of the disk platter, as shown in the illustration.