This makes maintenance easier, but without RAID, one hard disk crash basically breaks the server. An alternative technique for data centers is, therefore, to simply send the data to several servers at once. However, RAID is complicated to configure, so you don't want to be constantly setting it up. If one disk drive in such a RAID fails, no data is lost. RAID comes in several levels (varieties) which have different applications, but one of the big applications of RAID is creating mirrored hard disks that back each other up. RAID ("redundant array of independent disks") is a technology that splits data across several hard drives as if they were one. The technique was made famous by Google circa 1999, when its successful cost-effective server designs were actually using sub-consumer, nearly junk, hardware. This comic expands, to the limit, the strategy that it's a net cost saving to allow cheap hardware to fail and simply replace it than to have robust but much more expensive systems to start with. It didn't reverse entropy-it just discarded the universe when it reached end-of-life and ordered a new one. Title text: Asimov's Cosmic AC was created by linking all datacenters through hyperspace, which explains a lot.
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