System and method for scrubbing errors in very large memories

摘要

Systems and methods for improving scrubbing techniques are provided. In one aspect, the error correction code for a memory line is strengthened by reorganizing the memory line into distinct portions and providing an error code set that includes a distinct error code for each portion of the memory line. In another aspect of the invention, the scan rate is effectively increased by moving memory scrubbing functionality into the memory system and distributing it among a number of subcomponents that can operate scrubbing functions in parallel. The effective scan rate increase reduces the probability of failure for any given ECC strength.