I am constantly disappointed with the large capacity drives, due to the high failure rates.
In my computer business, I have no Caviar Green that have survived through their warranty period.
WD is very good about warranty replacement, but there is a caveat: the remainder of the warranty is gone.
If a drive with a 5 year warranty fails at 6 months, they replace it. That drive has a 90 day warranty. You are now done.
The RED series are high density, i.e. 1TB per platter.
This is 2x the density of the RE4 platters, so one has to wonder if also 2x higher failure rate in the RED series. I don't know.
The Newegg unhappiness is pretty uniform for DOAs and the like, across all models.
I have a pair of 1TB RE4 in shipment for an ESX 5.1 host with an Adaptec 2405 hardware RAID card.
These will be my first RE4 drives.
Before using them, each will have to undergo the Extended DLG testing, and pass 100%.
Those that do not, are going back as Unacceptable.