Test read method using as-deposited MAMMOS media

Abstract

To eliminate the time required for test data recording before test read, we studied test read approaches using as-deposited MAMMOS media, i.e., without recording the pre-determined test data onto the media. We consider the accumulation of the absolute values of this difference in the two moving averages as a good criterion to obtain desirable readout laser power. The results from our experiments suggest the proposed method is effective as long as the as-deposited conditions can be well-controlled.