SCOTTS VALLEY, California - Seagate Technology today announced that its scientists have broken new ground in the field of magnetic data storage by demonstrating areal densities of over 100 gigabits per square inch (Gb/in2) using perpendicular recording technology. This "vertical" move has also enabled record performance data rates of up to 125MB per second. As the areal density growth rate of current longitudinal recording begins to slow, perpendicular recording appears best-positioned to keep pace with the world's growing data storage needs, with the potential for far higher density levels over time than could otherwise be achieved.
"Perpendicular recording is projected to achieve areal densities as high as one terabit per square inch (Tb/in2), roughly 20 times the density of today's state-of-the-art disc drive products," said Dr. Mark Kryder, Seagate Senior Vice President of Research. "This is equivalent to storing over one full terabyte (1,000 gigabytes) of information or nearly 500 DVD movies on a single 3 inch disc."
Perpendicular recording arranges the magnetic bits vertically on the surface of the disc, enabling the head to record and read more information per unit area. Perpendicular recording breaks new ground because today's disc drives use traditional longitudinal recording that arranges the bits horizontally on the disc and therefore also require more surface area to store information.
"These demonstrations are proof of the increasing maturity of the technology, which we intend to use in Seagate products in the future," said Mike Covault, Vice President of Seagate's Advanced Technology Integration Team. "The shift to perpendicular recording highlights a technology roadmap for magnetic recording to continue to address the needs of an increasingly data-intensive, digital world."
Seagate anticipates implementing perpendicular recording in its products, perhaps as early as calendar year 2004.
Using industry-standard test procedures, Seagate has achieved a recording density in Perpendicular Recording of 100 Gbits per sq. inch, at 700 kbpi by 143 ktpi and over 330 Mbits per second. This is the highest areal density reported to date for Perpendicular Recording systems and represents a significant advance in the state of the art over the previous record of 60 Gbpsi.
The demonstration was carried out with a hardware channel under realistic and stringent drive conditions that incorporated a full set of adjacent data tracks on multiple heads and media. Moreover, the heads used were fully integrated read/write heads, specifically designed for both perpendicular recording and use at this high track density. The media was double layered perpendicular media.
Seagate's performance demonstration showed perpendicular recording functioning at a record data rate of 125 Mbytes per second with an areal density of nearly 60 Gbits per square inch. This is the highest data rate and areal density combination ever reported for perpendicular recording, overtaking the limits of the previous record of 125 Mbytes per second at only 13 Gbits per square inch.
These demonstrations were conducted by Seagate's Head Technology Development group and Advanced Concepts Lab in Minnesota, using heads manufactured there and in Seagate's Northern Ireland recording head plant.
Both achievements continue the rapid increase in performance and capacity for perpendicular recording systems over the past 12 months and position Seagate as the leader in this technology. Perpendicular recording will ensure that continued progress in disc drive capacity and performance will be made well into the future.
Seagate is the worldwide leader in the design, manufacturing and marketing of hard disc drives for Enterprise, PC and Consumer Electronics applications. The Company is committed to providing award-winning products, customer support and reliability, to meet the world's growing demand for information storage. Seagate can be found around the globe and at www.seagate.com.
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