It is kind of cool just how long spinning rust was the ne plus ultra of mass storage. The IBM Model 350 Disk File was released in 1956 and it immediately outclassed the other options for durable storage (punchcard and tape). SSDs only became fully competitive with disk storage in 2009 or so (realistically it's more like the mid-2010s in terms of price but I'm being conservative here). That means that for ~53 years the hard disk reigned supreme as production mass storage. That's a dominant lifespan on par with computer display CRTs (starting with the PDP-1 in 1959 and more or less ending in 2008 when CRT sales globally fell below LCD displays, 49 years) and the transistor (TRADIC, 1954).


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