Data storage system and a method for measuring a change in a spacing between a head and a storage medium of a data storage system
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United States of America Patent
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Sep 1, 2015
Grant Date -
May 9, 2013
app pub date -
Nov 1, 2012
filing date -
Nov 3, 2011
priority date (Note) -
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Abstract
A method for measuring a change in a spacing between a head and a storage medium of a data storage system. The method includes obtaining a first readback signal from the storage medium using the head at a first spacing between the head and the storage medium, determining a first power spectrum density over a frequency range from the obtained first readback signal, obtaining a second readback signal from the storage medium using the head at a second spacing between the head and the storage medium, determining a second power spectrum density over the frequency range from the obtained second readback signal, and providing a measurement indicative of the change in the spacing based on the determined first power spectrum density and the determined second power spectrum density. A data storage system is also provided.
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