...1956. IBM leased the 350 Disk File for a $35,000...
Moore's law is a pretty good predictor of many things.
$7K/Month-MegaByte in 1956 works out to $2/Month-TeraByte
today so its not too far off, if it is off at all.
the impression I got from the pictures I've seen
is that
drive technology didn't typically use platters *that* large.
14" was popular 1970-1980, so what about before it?
And don't forget that mainframes were just always in a lerger
class.
I have a salvaged platter (with spindle) here about
26.3" across. Darned if I know from whence it cometh. Anybody?
John A.