Winchester disk drive
Introduced by IBM in 1973 as the model 3340, the Winchester disk drive was a hard drive. It had 30 MB of fixed and 30 MB of removable storage; thus earning its nickname after the Winchester 30-30 rifle.
The disks of featured a 30 millisecond access time, and a coating of lubrication that allowed the heads to remain in contact with the surface when rotation speed was increased or decreased. After the Winchester, lubricated coating became the standard for mechanical hard drive development.