Interesting and brief history of data storage on disk drives. I purchased my first disk drive for $10,000 in the late '70s – a broken Memorex 630 (5mb fixed, 5mb removable) that I repaired and interfaced to a 2.5MHz Z80. By today's standards this sounds almost insane, but back then, trust me, it was a bargain.
In my years in the U.S. Navy in the early '70s, I worked with several other kinds of data storage: magnetic tape, magnetic drums, paper tape (seriously!), magnetic cores, and the most amazing of all – recirculating mercury delay lines. Data storage was hard back then!
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