$Western Digital(WDC)$ It is a common misconception that flash storage will entirely replace spinning hard drives in data centers. High-capacity enterprise HDDs like Western Digital's 40TB+ ePMR and UltraSMR drives remain significantly cheaper per terabyte than enterprise SSDs, which keeps their total cost of ownership much lower. At exabyte scale, a hyperscaler like Google operates massive global data center networks for YouTube, Google Photos, Gmail, and Google Cloud. Transitioning entirely to SSDs across that footprint would destroy their profit margins, so they run a tiered architecture instead: SSDs for immediate compute and cache, with Western Digital's mass-capacity HDDs holding the vast ocean of baseline data.
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