Definitions for "Areal Density"
Keywords:  tpi, bpi, platter, multiplied, inch
A measure of the packing density of a disk drive: achieved by multiplying the figure for tracks per inch (tpi) with that for bits per inch (bpi).
The amount of data that can be stored in one area of a disk-hard or floppy.
Described as grams per square metre, it is the weight of the armoured panel, divided by the protection area of the panel. It gives an indication of the energy absorption capability of the material.