In the late 1990’s and early 2000’s areal density for hard disk drives (HDD) approximately doubled every year, until reaching about 40Gb/sqin. Recently technology challenges have slowed the annual areal density growth rate to about half of what it had previously been. As advances in HDD’s continue, new approaches will be required to further increase areal densities. Hitachi Global Storage Technologies has begun using Adaptive Formatting as one of the technologies which has allowed to successfully producing HDDs in volume at areal densities higher than 70Gb/sqin. This four-page White paper describes Adaptive Formatting technology.
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