Selective copy-back

摘要

Information associated with a neighborhood is obtained based at least in part on a source location. It is determined, based at least in part on the information associated with the determined neighborhood, whether to perform a copy back operation using a specified set of one or more read thresholds. In the event it is determined to perform the copy back operation using the specified set of read thresholds, the copy back operation is performed on the source location using the specified set of read thresholds.

主权项

1. A system for moving data, comprising:
a selective copy back controller configured to: obtain information associated with a neighborhood based at least in part on a source location; determine, based at least in part on the information associated with the determined neighborhood, whether to perform a copy back operation on the source location by:
determining whether a number of bit errors is greater than a bit error threshold or if a correctable/uncorrectable status is set to uncorrectable such that:when it is determined the number of bit errors is less than the bit error threshold and the correctable/uncorrectable status is set to correctable, the selective copy back controller is configured to perform the copy back operation using a specified read threshold, andwhen it is determined the number of bit errors is greater than the bit error threshold or the correctable/uncorrectable status is set to uncorrectable, the selective copy back controller is configured to obtain a new read threshold and to perform the copy back operation using the new read threshold; and a neighborhood table configured to store the information associated with the neighborhood.