On Mon, Jul 1, 2019 at 5:31 AM Clem cole <[email protected]> wrote: > 19” form factor for the disks drive fir the space in the 19” relay rack. > You’re right the platters themselves were smaller. The disks were referred > too by the mechanical FF. 19, 8, 5.25 etc. >
The DEC RP and RM drives were not rack-mount, and the drives were much wider than 19-inch. The entire industry referred to disk size in terms of the platter diameter, which went from 14 to 8 to 5.25 to 3.5 to 2.5 inches. The drives were always wider than the stated platter diameter.
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