In recent days, several SSD manufacturers have made it known that they wanted nothing to do with Samsung’s new 32nm NAND Flash chips. Now Samsung is coming clean and admitting to the issues. The new chips suffer from unacceptably slow write speeds, and are therefore not suitable for use in SSDs. It seems the problem lies mainly with the chips interaction with existing flash controllers.

According to Samsung, "… for quality SSDs, every NAND process geometry upgrade requires a matching upgraded controller.  Should (Samsung's) 30nm-class NAND be used with a conventional controller of insufficient quality, performance slowdowns are indeed possible."

NAND flash memory uses floating-gate transistors to create arrays of memory cells. As these arrays scale to smaller and smaller sizes, errors will accumulate faster. Error Correcting Code (ECC) on the controller is used to correct these issues. If an insufficiently powerful controller is used, the memory may become corrupted. Samsung is currently working on its own flash controller to pair with the 32nm NAND chips. In the meantime, don’t expect SSD price drops for at least several months.