Disco Magnético

The first hard disk drive was the IBM Model 350 Disk File that came with the IBM 305 RAMAC computer in 1956. It had 50 24-inch discs with a total storage capacity of 5 million characters (just under 5 MB).

Above: IBM Model 350, the first-ever hard disk drive.

The first hard drive to have more than 1 GB in capacity was the IBM 3380 in 1980 (it could store 2.52 GB). It was the size of a refrigerator, weighed 550 pounds (250 kg), and the price when it was introduced ranged from $81,000 to $142,400.

Above left: A 250 MB hard disk drive from 1979. Above right: The IBM 3380 from 1980, the first gigabyte-capacity hard disk drive.

1980 - Time Line - Computação

1. O primeiro Hard Disk Drive para microcomputadores é capaz de armazenar cinco megabytes de dados. Foi produzido pela Seagate Technology.
2. A Phillips desenvolve o primeiro disco óptico de armazenamento de dados. Tinha uma capacidade sessenta vezes maior que o disco de 5 ¼".
3. Um computador habilitado com alto desempenho na busca de informações é inventado por John Shoch, da Xerox.