Channel marking for chip mark overflow and calibration errors

摘要

Marking memory chips as faulty when a fault is detected in data from the memory chip. Upon detecting that a plurality of memory chips are faulty, determining which of a plurality of memory channels contains the faulty memory chips. Marking one of a plurality of memory channels as failing in response to determining that the number of failing memory chips has exceeded a threshold.

主权项

1. A memory system comprising:
a plurality of memory channels comprising a plurality of memory devices, the plurality of memory devices comprising a plurality of memory chips; and a marking module coupled to the plurality of memory channels, the memory system configured to perform a method comprising: detecting whether a chip error has occurred in one of the plurality of memory chips in a first memory channel of the plurality of memory channels, the detecting spanning across at least one rank of the plurality of memory channels, and generating chip mark data based on the chip error occurring; receiving, by the marking module, the chip mark data; determining whether a number of chip errors in the at least one rank exceeds a chip mark threshold based on the chip mark data and a mark table of the marking module, wherein the chip mark threshold comprises a number of available chip marks in the mark table; based on determining that the number of chip errors in the at least one rank exceeds the chip mark threshold, determining whether one of the plurality of memory channels comprises a marked channel; based on determining that none of the plurality of memory channels comprises a marked channel, determining, based on the mark table, whether there are multiple chip marks in any channel of the plurality of memory channels; and based on determining that there are not multiple chip marks in any channel of the plurality of memory channels, marking the first channel as a marked channel.