[i too am having problems with WD, both its drives and its horrible customer support.
I was using 3 Raptors WD1500ADFD and a WD5000KS, in a Raid 5, using an Intel Ichr7 controler.
Seems to run fine for 3-5 days them the drives show as non-member drives, I replaced the motherboard, and the drives passed WD diags. They still show up as non-member drives in less than a week.
WD customer support is a joke, all I got was an automated reply, and even after 2 updates no response.
I bought Seagate drives, No problems.
Anyone want to buy some Raptors cheap?