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A direct-access storage device based on tape! 

"In comparison to the contemporary IBM 2311 Disk Device, the IBM 2321 Data Cell Device holds 55 times more data, while being only seven times slower (85ms and 600ms access times respectively)."

My dad just told me about this crazy machine that he managed to avoid working on. He apparently switched to programming to avoid having to work on things like this.

IBM 2321 Data Cell - Wikipedia
en.m.wikipedia.org/wiki/IBM_23

A direct-access storage device based on tape! 

Mass Mutual had 2 of these, 3 2311 disk drives, and 2 2314 disk arrays. The 2321s had 800 megs total and the disks were less than 80 megs total.

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