PMR

Perpendicular Magnetic Recording is a improved method for storing data on platters, allowing for greater areal density. Unlike the present method, also called Longitudinal Magnetic Recording, where the magnetised areas are laid out end to end, in PMR, the areas are arranged vertically, side by side, thus reducing the space they occupy. Primary Partition refers to the partition whose details are included in the Master Partition table in the MBR. A maximum of four primary partitions can exist in a hard disk.