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IBM announced the world’s first HDD, the 3.75MB RAMAC 350 disk storage unit, 69 years ago today — unit weighed more than a ton, 50 platters ran at 1,200 RPM
This massive stacked magnetic disk design earned the nickname the ‘baloney slicer.’
On this day in 1956, IBM announced the RAMAC 350 Disk Storage Unit, packing an awe-inspiring 3.75MB of data across 50 magnetic platters, each spanning 24-inches in diameter and spinning at 1,200 RPM. The IBM RAMAC 305 computer system paired with the 350 disk, for its high speed random access to information, and delivery of “exponentially faster” performance and efficiency vs prior storage technologies. IBM’s historical blog post about the RAMAC notes the device became the “progenitor of all hard disk drives… paved the way for the invention of the relational database… and ultimately laid the groundwork for everything from spaceflight and ATMs to search engines and e-commerce.”
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