Topic summary
IBM 3370
Extracted from the Wikipedia article History of IBM magnetic disk drives.
IBM 3370
IBM introduced the IBM 3370 Direct Access Storage Device in January 1979 for IBM 4331, 4341, and System/38midrange computers. It has seven fixed 14-inch (360 mm) disks, and each unit has a capacity of 571 MB. It was the first HDD to use thin-film head technology; research on that technology started at Thomas J. Watson Research Center in the late 1960s. The 3370 was a fixed-block architecture device, used on DOS/VSE and VM, the only S/370 operating systems that supported FBA devices.