Hard drives feature platters that take a fair bit of energy to keep spinning at thousands of rotations per minute. Power consumption is of course a greater concern for mobile applications, but it’s become a key metric for desktops, as well. Those spinning platters also introduce a measure of rotational latency that severely impedes seek performance. The drive head can’t just go and grab data from a given target; it has to wait for that target to come ’round on the platter.
Solid-state drives (SSDs) aim to solve the problems associated with hard drive mechanics by replacing them with memory chips.
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