Pemalite on 30 November 2013
| kumagawa said: 9.5mm HDD's can have a maximum of 2 platters so as 320GB platters are replaced by 500GB ones the 640GB HDD's have been discontinued. |
You can have more than two platters.
http://techreport.com/news/24839/hgst-packs-1-5tb-into-9-5-mm-three-platter-travelstar-5k1500-notebook-drive
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