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TMR and squeeze at gigabit areal densities

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2 Author(s)
Arnett, P.C. ; IBM Almaden Res. Center, San Jose, CA, USA ; McCown, D.

The track misregistration (TMR) required to achieve gigabit areal densities is calculated for a set of components based on the average bit error rate for a file. The average error rate is a statistical average, based on the TMR of the file, of the on-track and off-track error rate. The on-track and off-track error rates are dependent on squeeze from adjacent tracks. In this analysis, the average error rate is calculated using measured error rate profiles of the center track. For a file average soft error rate of 1×10-6, the results show, for a particular head/disk combination designed for gigabit recording and operating at a linear density of 158 kbpi, that a track pitch of 4.0 μm (3.35 ktpi) can be achieved with a TMR of 0.635 μm. Obtaining this TMR value in a file is one of the challenges to recording of 1 Gb/in2 in magnetic storage products

Published in:

Magnetics, IEEE Transactions on  (Volume:28 ,  Issue: 4 )

Date of Publication:

Jul 1992

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