Just started preclearing drives last night for my first unRAID machine, I bought 2 3tb WD Red's (one for parity, one for data) and I went so far as to buy one from amazon and one from newegg. Side note both arrived in great condition as well as had good packaging; amazon had the plastic end caps while newegg had the drive in this bubble wrap sleeve(pretty cool I thought). Anyway from everything I have read on the forums everybody recommended not getting 2 or more drives from the same vendor to reduce the potential of getting a bad batch. Now to some this my be overkill and they have bought large batches without having a bunch fail out once, others not so lucky. So what do people think a good waiting period is? Week, month, etc...