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| In late 1999 Hitachi GST demonstrated a
GMR head with an areal density capability of greater than 35
billion bits per square inch in the laboratory, and today Hitachi
GST is currently producing products (Travelstar 80GN, Travelstar
4K80 ) with an areal density of 70 Gbits/in2. The industry has
demonstrated up to 150 Gbits/in2 in the laboratory, indicating
that future disk drives could exhibit capacity increases at
least 2 times higher than today's products. It is reasonable
to assume that disk drives will continue to be enhanced well
into this decade through the use of advanced heads and media
for increased linear density, and new mechanical techniques
for improved track density operation. These enhancements are
expected to extend the life of magnetic hard disk drives well
into the future and newer, nonmagnetic storage devices must
equal of exceed this progress to be competitive. To date there
are very few indications of non magnetic technologies which
have this competitive potential to replace magnetic hard disk
drives. |
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