"Although SSD vs. HDD speed is vastly different, for the foreseeable future, hard disks will have a place in our increasingly solid-state and even DRAM-centered data centers.
Hard disk drives are hard to like. This 60-year-old device is slow and accesses data clumsily, but it stores volumes of data at a price that's hard to beat. Since the middle of the last decade, solid-state drive advocates have argued that SSDs would completely displace HDDs over the following few years. Yet here we are in 2017, and the HDD vs. SSD controversy continues. HDDs still play a greater role than SSDs in PCs and servers, and HDD unit shipments aren't much below 2005 levels..."
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