#TodayInHistory 1956 - #IBM introduces the IBM 350 Disk File, the first hard drive, as part of the IBM RAMAC 305 computer.
The drive features fifty double-sided 24-inch diameter platters, served by one arm and one read/write head. Capacity is about 5 MB, the disks spin at 1200 rpm, and transfer rate is 8800 characters per second. The IBM RAMAC 305 system with 350 disk storage leased for $3,200 per month.
#retrocomputing #hardware #storage