History of IBM magnetic disk drives

IBM 305 at U.S. Army Red River Arsenal, with two IBM 350 disk drives in the foreground

RAMAC mechanism at Computer History Museum

IBM 1311 Disk Drives - Model 2 (Slave) & Model 3 (Master)

IBM 1311 disk drive with IBM 1316 removable disk pack at the Computer History Museum

IBM manufactured magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. Both the hard disk drive (HDD) and floppy disk drive (FDD) were invented by IBM and as such IBM's employees were responsible for many of the innovations in these products and their technologies. The basic mechanical arrangement of hard disk drives has not changed since the IBM 1301. Disk drive performance and characteristics are measured by the same standards now as they were in the 1950s. Few products in history have enjoyed such spectacular declines in cost and size along with equally dramatic improvements in capacity and performance.

单词	Single Large Expensive Disk
释义	Single Large Expensive Disk 英语百科 History of IBM magnetic disk drives IBM manufactured magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. Both the hard disk drive (HDD) and floppy disk drive (FDD) were invented by IBM and as such IBM's employees were responsible for many of the innovations in these products and their technologies. The basic mechanical arrangement of hard disk drives has not changed since the IBM 1301. Disk drive performance and characteristics are measured by the same standards now as they were in the 1950s. Few products in history have enjoyed such spectacular declines in cost and size along with equally dramatic improvements in capacity and performance.
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Single Large Expensive Disk

History of IBM magnetic disk drives