Western Digital released a updated version of the WD3200AAKS 6 months ago, its now has only 1 platter, faster performance, lower acoustics, and lower power consumption compared to its older 2 platter model. Apparently a number of retailers still havnt had the new models filtered down through re-stocks.
It would be nice to know if this is a 1 or 2 platter version of the model, and it would also be useful if you could state in the technical information of how many platters the model has.