Seagate Expects 2.5TB HDDs in 2009

Seagate Technology reported a new world record for magnetic recording density of 421 Gbits per square inch (421 Gbit/in2). The demonstration used perpendicular recording heads and media created with currently available production equipment that validates Seagate's ability to scale the technology for the foreseeable future without major technology changes or capital additions.



Seagate said its demonstration reaffirms the disc drive as "the undisputed king of storage when capacity and cost-effectiveness are both required."



At the demonstrated density level, Seagate expects the capacity ranges to result in solutions ranging in 40GB to 275GB for 1-and 1.8-inch consumer electronics drives, 500GB for 2.5-inch notebook drives, and nearly 2.5TB for 3.5-inch desktop and enterprise class drives. At 2.5TB capacity, a hard drive would be capable of storing 41,650 hours of music, 800,000 digital photographs, 4,000 hours of digital video or 1,250 video games. Seagate anticipates that solutions at these density levels could begin to emerge in 2009.



The areal density of 421 Gbpsi was demonstrated using 10 E-3 off-track bit error rate criteria with 5% squeeze and meeting a 10% off-track capability at a data rate of 735 Mbps. The track density was 275,000 tracks per inch, and the linear density was 1.53 million bits per inch for a bit aspect ratio of 5.6. The demonstration was conducted using a product channel, perpendicular head, and thermally stable media created with current production equipment.

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