Imx6ul new emmc
From embeddedTS Manuals
Due to an EOL on the older Micron MTFC4GMDEA-4M IT part, the replacement Micron MTFC4GACAJCN-4M IT has been qualified for use on this board. This new eMMC flash includes write reliability enabled by default. This will improve reliability for power loss events without requiring user intervention. These modes are further detailed in the EMMC section.
This may require a change to production processes for those using the "emmc_reliability" script which sets both enhanced area and write reliability. This new chipset will require the latest version including this patch to function correctly.