this post was submitted on 14 Sep 2025
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retrocomputing

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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 (www.tomshardware.com)
submitted 16 hours ago by cm0002@piefed.world to c/retrocomputing@lemmy.sdf.org
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[–] dparticiple@sh.itjust.works 34 points 15 hours ago

The Tom's Hardware article doesn't discuss the pricing structure, however the Wikipedia article does -- the RAMAC 305 was leased, not purchased, for $35,800 per month in 2024 USD).