Western Digital and subsidiary SanDisk have a new NVMe controller to use with 64-layer NAND. Is the new combination enough to topple the company's largest rival?

What is the secret to success? In the SSD business, it's vertical integration. That means designing all of the important components so they can work together to deliver the best possible performance and reliability at a low price point. In the past, only Samsung, Toshiba, and Intel produced their own flash and SSD controllers. Now, thanks to subsidiary SanDisk, Western Digital joins the club.