Patent ID: 6498696
Filing Date: 2002-12-24
Classification: G11B

Abstract:
A method for writing a block of data with a combined read-write head, wherein the read head of the combined read-write head is a magnetoresistive (MR) sensor, and further determining a designated polarity comprising the steps of:generating a set of write pulses; generating at least one additional write pulse of a designated polarity; measuring the magnetic instability of the read head when the last write pulse before each read has positive polarity; measuring the magnetic instability of the read head when the last write pulse before each read has negative polarity; comparing the magnetic instability of the read head with positive polarity last write pulses with the magnetic instability of the read head with negative polarity last write pulses; and setting the designated polarity equal to the polarity of the last write pulses that produces the least amount of magnetic instability.