Are We Having Fun Yet?

I don't remember enough about Hollerith card specs to do better than estimate, but here goes a guesstimate:

750 x 10^9 bytes: new drive
card: roughly 80 bytes +- factor of 2
weight of card: guess .1 oz
tonne / oz = 2.83495231 × 10-5 (from Google Conversions)

7.5x10^11 bytes/disk * 1x10^-2 cards/byte * 1x10^-1 oz/card * 2.8^10-5 tonne/oz --> 2x10^4 tonnes (of cards) per disk

Very roughly 20,000 tonnes of cards. Eek. Of course I may have made a mistake and I don't care enough to check... :)




c. 2x10^4