The primary computer storage medium until the turn of the century when solid state drives began replacing them. Hard disks emerged in corporate datacenters in the late 1960s and began to flourish ...

featuring the IBM Model 350 disk storage unit (US Patent 3,503,060). This groundbreaking drive offered 5MB of storage at $10,000 per MB. At the time, customers would pay over $3,200 per month to ...

Also referred to as the IBM 350 Disk Storage Unit, the drive was roughly the size of two refrigerators and was mounted on a sturdy metal frame anchored to the floor. It required a dedicated air ...