TDK Corporation recently revealed a roadmap that says 2.5” 640GB and 3.5” 2.5TB HDD should be available by January 2010

TDk themselves are a major player in the manufacture of read/write heads for many HDD suppliers. They are currently producing high density read/write heads for 250 GB/platter (2.5-inch) and 500 GB/platter (3.5-inch). They have however said in the roadmap that these will increase in size to 320GB/platter and 640GB/platter respectively.

The 3.5” platters will go into production by Novemeber and then released by January. We will see the 2.5” ones a little sooner with production beginning possibly this month to get a December release.

It is also rumoured that later next year we could then see a 5 platter HDD providing a whopping 3.2TB