Seagate promises 60 terabyte 3.5-inch hard drives within 10 years

Seagate has become the first hard drive manufacturer to pack 1 terabit - one trillion bits - into a single square inch. The technology used to achieve the benchmark, which Seagate said it would introduce in products later this decade, will also lead to the production of 3.5-i. hard drives with up to 60TB of capacity.

The technology behind the super-dense drives is heat-assisted magnetic recording (HAMR). According to Seagate it will rapidly replace the presently standard hard disk drive technology, Perpendicular Magnetic Recording (PMR), which records data on the spinning platters inside hard disk drives. The new technology offers a theoretical areal density limit ranging from five to 10 terabits per square inch, or 30TB to 60TB for 3.5-inch hard disk drives and 10TB to 20TB for 2.5-inch drives.

"The key to areal density gains is to do both without disruptions to the bits' magnetisation, a phenomenon that can garble data," Seagate said. "Using HAMR technology, Seagate has achieved a linear bit density of about [two] million bits per inch, once thought impossible, resulting in a data density of just over [one] trillion bits, or [one] terabit, per square inch - 55 per cent higher than today's areal density ceiling of 620 gigabits per square inch."

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