Select your reply and the proper selection shall be revealed.
After wanting into completely different applied sciences together with wire matrices and rod arrays, IBM invented the arduous disk drive at its San Jose California lab in 1953 and initially referred to the expertise as a “Random Entry File,” which proved to be cheaper and slower than drum reminiscence, however sooner and costlier than tape drives.
The primary industrial arduous disk drive was shipped in 1956 because the IBM Mannequin 350 disk storage (US Patent 3,503,060) contained in the IBM 305 RAMAC system, which provided 5MB of storage at $10,000 per MB. On the time, clients would pay over $3,200 per 30 days for accessing and storing that data as IBM leased its programs. That’s equal to over $31,000 per 30 days in 2021. Three generations of RAMAC drives had been developed with capability doubling in every technology.
The IBM 305 RAMAC was comprised of fifty 24-inch disk platters contained inside a big boxy cupboard that resembled washing machines — a far cry from in the present day’s 3.5″ or 2.5″ disk drives, not to mention stable state drives that are coming within the even smaller M.2 kind issue.
Source link
