1973: The "Winchester Drive"
The IBM 3340 was introduced in 1973 with three removable data modules, including a 35-MB and two different 70-MB modules. However, when the drive was originally designed, the two modules were expected to be 30 MBs each. That 30-30 configuration sounded like the name of one of the most famous rifles in history, the Winchester .30-30, and so that name stuck despite the eventual configuration of the modules.
The 3340 was also the first drive to feature lubricated disks and a sealed assembly.