Posted Apr 6, 2011 15:32 UTC (Wed) by butlerm (subscriber, #13312)
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The first 20% figure in the article refers to the gain from using 4K sectors. The second one I don't know about, but I assume it refers to the gain from using some form of first generation SMR, as opposed to the long term gains possible.
Of course I can't imagine why anyone would actually purchase (or market) an SMR drive with only a 20% capacity increase anytime soon given all the other problems.