Patent ID: 8822047

Claim:
A patterned-media magnetic recording disk comprising: a disk substrate; a plurality of substantially identical discrete magnetizable pillars on the substrate representing discrete data bits, the pillars being arranged into a plurality of concentric circular data tracks and spaced-apart along the tracks, the pillars having a rectangular shape with an aspect ratio of cross-track length to along-the-track width greater than 2 wherein each individual circular data track contains only one pillar in the cross-track direction, the pillars having an areal bit density greater than or equal to 1 Terabits/in 2 and a bit aspect ratio (BAR) equal to or greater than 2, where BAR is the ratio of linear pillar density in bits per inch (BPI) in the along-the-track direction to track density in tracks per inch (TPI) in the cross-track direction.