Read buffer architecture supporting integrated XOR-reconstructed and read-retry for non-volatile random access memory (NVRAM) systems

A method comprising:

• issuing a read request to read one or more units of data from at least one non-volatile random access memory (NVRAM) device, the read request comprising one or more read voltage thresholds;
• receiving the one or more data units and read command parameters used to read the one or more data units from the at least one NVRAM device;
• and
• storing error-free data units, the read command parameters used to read the error-free data units from the at least one NVRAM device, and a read completion status to one of a plurality of read buffers, wherein the read completion status indicates a completed read when a data unit is error-free and indicates an incomplete read when a data unit is errored.

A computer program product, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable/executable by a processor to cause the processor to:

• receive one or more data units and read command parameters used to read the one or more data units from at least one non-volatile random access memory (NVRAM) device;
• perform error correction on the one or more data units, the error correction producing an error status for each data unit, wherein each error status indicates whether an associated data unit comprises errored data or error-free data;
• store error-free data units, the read command parameters used to read the error-free data units from the at least one NVRAM device, and a read completion status to one of a plurality of read buffers, wherein a read buffer memory comprises the plurality of read buffers, and wherein the read completion status indicates a completed read in response to a determination that a data unit is error-free and indicates an incomplete read in response to a determination that a data unit is errored;
• store the read command parameters, the error status, and the read completion status in one of the plurality of read buffers for each errored data unit;
• and
• lock the one of the plurality of read buffers used to store the read command parameters, the error status, and the read completion status for each errored data unit to prevent autonomous selection thereof.