An Investigation of the Effects of Media Characteristics on Read Channel Performance for Patterned Media Storage:

In magnetic storage systems data capacities advances have been possible only using both continued refinement of the recording and the storage media as well as the heads replay properties. Longitudinal magnetic media is employed by present commercial systems, where the magnetization lies’ direction in the continuous magnetic film plane. It is predicted that the magnetic recording systems future generation will employ increasingly specific media, where magnetization lies direction perpendicular to the film plane; in this management, increased capacities of the storage have been examined by making comparison with the longitudinal media.

The shift to perpendicular media has created many technical challenges; notably most, the requirement for heads of the single-pole recording, media fabrication which is thin-film perpendicular on magnetic under layers (SULs) which are soft, as well as the design development of new read channel by reason of the differences of the signal spectra between perpendicular and longitudinal systems.

All challenges have been tackled successfully as well as made commercial perpendicular drives realization possible. But, beyond perpendicular media, few people consider the patterned media use will be required to gain densities of the storage media in 1 Tb/in2 excess as well as trounce the physical barriers that made restrictions on densities of ultrahigh-storage in continuous media.

Such shift which is a paradigm will introduce undoubtedly further difficulties which are technical that must be beat to realize specific storage systems; not slightest, the difficulties associated with the media fabrication.