Thanks. I can now see both the original web page and the images on this forum. I believe it takes some time for your uploaded images to be approved.
As for the fake, the huge disparity in data transfer rates is obviously suspicious, but the clincher in my mind is the fact that the fake is spinning at 5900 RPM whereas the RE4 is spinning at 7200 RPM. This is evident in HD Tune’s access time graphs.
http://52web.net/pic/hdtune-50823-1.jpg (fake)
http://52web.net/pic/hdtune3.5-50823.jpg (fake)
http://52web.net/pic/hdtune-2003fyys-true-2.jpg (genuine)
Notice that the spread of data points in the fake access time graph is about 10-11 msec wide, whereas the RE4 graph is about 8 msec wide. This corresponds to the time required for one complete revolution.
I believe the “fakes” are probably RE4-GP green drives. According to WD’s spec sheets, the WD2003FYYS RE4 drive spins at 7200 RPM and has a maximum sustained transfer rate of 138 MB/s, whereas the WD2002FYPS spins at 5900 RPM (“IntelliPower”) and has a transfer rate of 110 MB/s.
WD RE4 Series Disti Spec Sheet:
http://www.wdc.com/wdproducts/library/S … 701338.pdf
WD RE4-GP Series Disti Spec Sheet:
http://www.wdc.com/wdproducts/library/S … 701312.pdf
I know that WD sometimes uses two different platter densities in the same model. Here are two related threads where a user measured vastly different transfer rates for two WD6402AAEX drives:
http://community.wdc.com/t5/Desktop/WD6 … /m-p/40119
http://community.wdc.com/t5/Desktop/Che … /m-p/38541
