Felt it necessary to update this thread as Western Digital has pulled a 'fast one' on many of our previously stated 5 year warranty enterprise drives.
Original WD5000ABYS drive warrantied until 2014 was replaced with an enterprise drive that had a build date of August, 2011 last summer. Okay, great, it looks like a new drive with newer date, it's not a refurb, must be under warranty for a long time.
Fast forward about 8 months and the drive has failed. Warranty expired December, 2011 (! four months after the build date)
I decided to scrounge through our paperwork and pull up the original serial number of the first replaced drive and it's coming up as "Out of region" with a description, "Product is outside the region (Americas, Europe-Middle East-Africa, or Asia-Pacific) where it was originally shipped." Yeaaa... not exactly.
So, to add to my previous post it seems that Western Digital lies as they do not transfer the warranty as their representatives stated and if you do not retain your paperwork, you lose your warranty if your drive breaks under warranty. So far none of our January RMA'd drives have retained their original warranty.
I'm going to try and RMA this recent drive and relay what the representatives state concerning warranty.
Again, save all RMA paperwork, packing slips, communications when dealing with Western Digital.