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IBM 350 Disk Storage Unit – the first ever disk drive

Standing 0.7m wide, 1.5m long and 1.7m tall and weighing over a ton the IBM 350 disk storage unit was the first ever disk drive, released in 1956, moving in on the old punchcard system!

It boasted 3.75 megabytes capacity on fifty 61cm diameter magnetic surfaced disks, that spun at 1200 RPM giving a transfer rate of 8,800 characters per second!

Check out more on the evolution of storage here:




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