Seagate Announces New Record Storage Density: Hard Disk Capacity Is Expected to Double

October 18, 2019

Seagate Announces New Record Storage Density: Hard Disk Capacity Is Expected to Double Seagate announced today that it has become the first hard disk drive manufacturer to achieve a milestone in storage density of 1Tbit/inch2 (1 terabit=1 trillion bit=1 trillion bits). The number of bits even exceeds the number of celestial bodies in the Milky Way (between 2000-400 billion).

The technology used by Seagate is called HAMR, which is Heat-Assisted Magnetic Recording. As the current hard disk adopts PMR (Perpendicular Magnetic Recording, successor of perpendicular magnetic recording technology), HAMR has a theoretical storage density of 5-10 Tbit/in2. In contrast, the current 3.5-inch hard disk storage density is 620Gbit/inch2, 2.5 hard disk storage density is 500Gbit/inch2.

HAMR technology can easily reach the limit of the storage density of PMR technology, which is a milestone of 1Tbit/inch2, which is about 55% higher than the storage density of current hard disk products. Once HAMR is put into practical use, the capacity of current 3.5-inch hard disk products can easily double to about 6TB, and the capacity of 2.5-inch hard disks can be improved to 2TB. In the future, the 3.5-inch/2.5-inch hard disk capacity of the matured HAMR technology can reach the current server level of 30-60TB/10-20TB.

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