Using PRM, this disk can store 230 GB of data per sq. inch

Perpendicular Magnetic Recording (PMR) data storage technology features 10 times the storage density of standard hard disk technology that, until now, has relied on a longitudinal recording process that is rapidly reaching its storage capacity limits.

The technology behind perpendicular data storage combines a thicker storage medium with a magnetic field, which lines up the bits of data on the medium in a perpendicular, or vertical, arrangement. When bits are stored vertically, versus the end-to-end manner employed by standard drives, they can be placed closer together creating higher aerial density on the medium. Higher density means more data storage. This new technology can currently store up to 1 TB per sq. inch versus 100 to 200 GB per sq. inch on standard hard drives. One terabyte is the equivalent of 1,024 GB - enough to hold more than 240,000 songs in digital music formats! Consumer demand for smaller portable electronic devices with increased data storage capabilities is pushing the boundaries of 2-1/2" drive technology.

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