DATA RETENTION DETECTION TECHNIQUES FOR A DATA STORAGE DEVICE

摘要

A data storage device includes a non-volatile memory and a controller. A method includes writing an indication of a first error rate of a first set of bits to the non-volatile memory. The first set of bits is sensed from a word line of the non-volatile memory. The word line is sensed to generate a second set of bits in response to a first power-on event being initiated at the data storage device after writing the indication of the first error rate to the non-volatile memory. The method further includes setting a data retention flag in response to a difference between the first error rate and a second error rate associated with the second set of bits satisfying a threshold.

主权项

1. A method comprising:
in a data storage device including a non-volatile memory and a controller, performing by the controller:
writing to the non-volatile memory an indication of a first error rate of a first set of bits, the first set of bits sensed from a word line of the non-volatile memory;in response to a first power-on event being initiated at the data storage device after writing the indication of the first error rate to the non-volatile memory, sensing the word line to generate a second set of bits; andin response to a difference between the first error rate and a second error rate associated with the second set of bits satisfying a threshold, setting a data retention flag.