ADAPTIVE READ VOLTAGE THRESHOLD CALIBRATION IN NON-VOLATILE MEMORY

A non-volatile memory includes a plurality of physical pages each assigned to one of a plurality of page groups. A controller of the non-volatile memory performs a first calibration read of a sample physical page of a page group of the non-volatile memory. The controller determines if an error metric observed for the first calibration read of the sample physical page satisfies a calibration threshold. The controller calibrates read voltage thresholds of the page group utilizing a first calibration technique based on a determination that the error metric satisfies the calibration threshold and calibrates read voltage thresholds of the page group utilizing a different second calibration technique based on a determination that the error metric does not satisfy the calibration threshold.