Performance optimization of read functions in a memory system

A method for optimizing performance of read functions in a memory system, the method comprising:

• receiving, at the memory system, a read request including a logical address of a target data, the memory system including a primary memory and a back-up memory that mirrors the primary memory;
• searching a fault monitor table for an entry corresponding to the received logical address, the fault monitor table comprising a plurality of entries that indicate physical locations of identified memory failure events in the primary memory and the back-up memory;
• based on locating an entry corresponding to the received logical address, selecting one of the primary memory and the backup memory for retrieving the target data, the selecting based on contents of the fault monitor table;
• receiving a correction notice indicating correction of one of the memory failure events;
• and
• removing an entry in the fault monitor table corresponding to the one of the memory failure events.