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IBM manufactured magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. [1] [2] 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. [3]
The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage. [1] The system was publicly announced on September 14, 1956, [2] [3] with test units already installed at the U.S. Navy and at private corporations. [2]
IBM System Storage TS7650G ProtecTIER Deduplication Gateway – Designed to meet the disk-based data protection needs of the enterprise data center while reducing costs. The system offers inline deduplication performance and scalability up to 1 petabyte (PB) of physical storage capacity per system that can provide up to 25 PB or more backup ...
Drum memory was a magnetic data storage device invented by Gustav Tauschek in 1932 in Austria. [ 1 ] [ 2 ] Drums were widely used in the 1950s and into the 1960s as computer memory . Many early computers, called drum computers or drum machines, used drum memory as the main working memory of the computer. [ 3 ]
The term DASD contrasts with sequential access storage device such as a magnetic tape drive, and unit record equipment such as a punched card device. A record on a DASD can be accessed without having to read through intervening records from the current location, whereas reading anything other than the "next" record on tape or deck of cards ...
First Magnetic Hard Disk Drive: IBM introduced the world's first magnetic hard disk for data storage, the IBM 350 disk storage unit, which stored 5 million 6-bit characters (3.75 MB) on fifty-two 24-inch diameter disks. This innovation marked the beginning of an era of efficient data storage.
The commercial usage of hard disk drives (HDD) began in 1957, with the shipment of a production IBM 305 RAMAC system including IBM Model 350 disk storage. [4] US Patent 3,503,060 issued March 24, 1970, and arising from the IBM RAMAC program is generally considered to be the fundamental patent for disk drives.
The IBM 350 Disk Storage Unit consisted of the magnetic disk memory unit with an access mechanism, the controls for the access mechanism, and a small air compressor. Assembled with covers, the 350 apparatus was 60 inches (1.5 m) long, 68 inches (1.7 m) high and 29 inches (0.74 m) deep.
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