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In high-density recording in helical-scanning tape systems, MR head-wear caused by contact between the head and the tape is a critical item. We examine a method of measuring MR head-wear which can be calculated in terms of MR head resistance. We then compare wear as determined by the micro-indentation technique and this method. We then use this measuring method to investigate MR head-wear and gap recession depth using a variety of tapes. We found that by optimizing the asperity of advanced ME tape with a protective layer, MR head-wear can be reduced.