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The most important invention of the 20th century? To one who was there, it was disk.

Publication: Computer Technology Review
Publication Date: 01-APR-04
Format: Online
Delivery: Immediate Online Access
Full Article Title: The most important invention of the 20th century? To one who was there, it was disk.(Golden Anniversary of HDD)(Racine Area Manufacturers and Commerce)(Interview)

Article Excerpt
The original IBM RAMAC shipped to its first customers in 1956, and the history of magnetic recording changed forever. The first impact was felt in inventory control, where the direct access of the huge drive saved serious money and time. One of the original team at IBM for commercialization of the RAMAC was Bill Donnelly, an IBM staff member and consultant from 1956 to 1998. Bill recently reminisced with editor-in-chief Mark Ferelli.

How did the RAMAC come about?

I went to San Jose in 1956, just prior to the shipment of the first RAMAC. They had built, I believe, nine test models and installed them in different places around the country--like Zellerbach Hall in San Francisco--as test machines. So I wasn't part of the original development of the RAMAC, but I was there from the very beginning, when they started getting serious about building and testing the machines.

How was it received by the original customers?

Very well--or else we would have killed it. It was really unique, because suddenly you had access to what seemed like an enormous amount of information. Five megabytes--five million characters. That would enable a company to keep track of 50,000 inventory items--or something like that. It was a huge step forward. And the unique thing about it was that it had what we first called "random access" and later called "direct access." You could get to any piece of information in less than a second. Prior to that--when they used magnetic tape--if you were searching on magnetic tape the odds were that you would have to search one...

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