Who developed the first hard drive?
Hard disk drive
IBM's first hard drive, the IBM 350, used a stack of fifty 24-inch platters and was of a size comparable to two large refrigerators. In 1962, IBM introduced its model 1311 disk, which used six 14-inch (nominal size) platters in a removable pack and was roughly the size of a washing machine. This became a standard platter size and drive form-factor for many years, used also by other manufacturers. The IBM 2314 used platters of the same size in an eleven-high pack and introduced the "drive in a drawer" layout, although the "drawer" was not the complete drive.
M-Systems
The software that made the computer see the Flash memory as a disk drive was called TrueFFS and it was awarded US patent No. 5404485 in 1995. This software and initially the Flash memory from Toshiba were combined to form the first solid state storage product called DiskOnChip. The DiskOnChip was first designed for the Single Board Computer manufacturers and was a 2 MB chip. The DiskOnChip was made to work with TFFS and was able to bypass the BIOS by disabling the F000 address in the advance CMOS setup. Rick Iorillo lead the development and design efforts in the U.S. and established the first distributor base for the sale of the 28 pin DIP with Ampro being the first customer in the U.S. Sales of the DOC were established with IBM and Brazil to help in capturing the data off the public transportation systems.