MK2431GAH and MK1231GAL achieve an
areal density of 531.
This is in contrast to the story in magnetic disk where the
areal density growth has slowed significantly with the associated slow down in the improvement in its cost of storage metric.
Since the size and number of disk platters are fixed in each defined disk drive format,
areal density is really the only parameter that can be improved to increase storage capacity.
Increased
areal density from improved head and disk coating
It is likely that the rate of data storage
areal density increase in magnetic recording will start to drop gradually due to the greater difficulty in making the new technology work.
2 The world's highest commercially available
areal density in a 1.
Kryder estimates that the switch to perpendicular recording will occur sometime between 100 and 200 gigabits per square inch
areal density.
5-inch HDD featuring the world's highest
areal density at 178.
Striving to provide more capacity per dollar, disk drive manufacturers have invested heavily in increasing the
areal density of their disks, with remarkable results.
Ed Grochowski, Executive Director, IDEMA USA, commented, "Today PMR has become a fully applied technology, responsible for the
areal density growth in leading edge disk drive products.
Areal density has grown at an impressive 60 percent compound annual growth rate, historically, and has accelerated to greater than a 100 percent rate since 1999.
However, industry requirements for increased
areal density and consumer electronic expansion will continue to drive future investment in perpendicular head technology, transition to smaller femto slider formats and conversion to larger wafer size.
