The connection between railway switching and data centers may seem unlikely for most, but many point to the width of a train car as a major influencer of IT racks’ and enclosures’ dimensions. By tracing their origins to deployments in railway signaling, many people believe the 19-inch equipment bay was chosen because the rack could fit within a train car. Since the initial decision to have a 19-inch equipment bay was made, it has not changed for almost a century.
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