Usually we can see the products is made for whom when we get a WD drive at hand,such as:
wd6400aaks-00a7B0
the number 00a7B0′s first two “00″means as below
00 = retail market
01 = other large customer market
22 = Promotional Samples
23 = IBM
53 = Gateway
60 = Compaq
71 = HP
75 [...]

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