Shipped in September 1956, the first 5MB hard disk unit weighed over a ton (approximately 2,200 pounds) and was used in the IBM 305 RAMAC, the first commercial computer to feature a moving-head ...

The first commercial hard disk drive was introduced in 1956 as part of the IBM 305 RAMAC (Random Access Method of Accounting and Control) system, featuring the IBM Model 350 disk storage unit (US ...