Patent ID: 6671232
Filing Date: 2003-12-30
Classification: G11B

Abstract:
In a data storage device having a storage media and a transducer head for writing data to, and reading data from, at least a surface of the storage media, the temperature of the transducer head and electrical resistance thereof varying as a function of media surface temperature change, a readback signal having a baseline modulation (BLM) as a result of electrical resistance variation of the transducer head, the storage device further including a laser system for heating the media for read and/or write operations with the transducer head, a method for determining the temperature of the media, comprising the steps of:(a) heating the media with the laser system; (b) obtaining a readback signal from the transducer head including said base line modulation; (c) detecting the baseline modulation from the readback signal; and (d) determining the temperature of the media as a function of the baseline modulation.