Western Digital has developed flash-enhanced drives with OptiNAND™ technology by vertically integrating the company’s leading NAND flash with its world-class HDDs. HDDs with OptiNAND Technology integrates an iNAND® Universal Flash Storage (UFS) Embedded Flash Drive (EFD) with traditional spinning disk media, and incorporates innovative changes to the firmware algorithm and system-on-a-chip (SoC).