Z-NAND

Last year at Flash Memory Summit, Toshiba announced XL-FLASH, a specialized low-latency SLC 3D NAND flash memory that is their answer to Samsung's Z-NAND (and to a lesser extent, Intel's 3D XPoint). Few details were provided at the time, but this year Toshiba is ready to give out more information, including a timeline for bringing it to market: sampling starts next month, and mass production begins next year. The first XL-FLASH parts will use a 128Gb die, divided into 16 planes to support a much higher degree of parallelism than existing capacity-oriented 3D NAND parts. The page size will be 4kB, significantly smaller than what most 3D NAND uses, but that's not a surprise given that XL-FLASH is storing just one bit per cell rather...