Summary: failed 2.6 years after installation. let down, because I paid premium to have a reliable drive. I do have my data, but also many hours ahead to re-install an OS, drivers, apps and also copy all the data.
Pros: 1 tb, fast enough. You may need that extended warrant.
Summary: Haven't installed them yet, BUT the drives were sold as "NEW" with a 5 year warranty. THE DRIVES SHOW 10/2012 DATE. THERE IS ALSO AN HP STICKER ON IT that states "spare parts" - nearly a third of the warranty period is gone [WD might honor it with sales receipt].
Summary: Bought two of these for a web server build, and one exhibited problems right off the bat. Rather than waste time with an RMA, I decided to simply purchase and overnight ship another -- which also is exhibiting problems now.
Pros: Capacity, speed, cache, RAID-compatibility
Cons: Failure rate is abysmal. I'm batting 0 for 3 right now.
Summary: I was hoping to have my customer's build done in a couple of days. Now he'll have to wait 1 to 1.5 weeks for the RMA process to get me a working drive. Maybe I should have purchased 4 drives, used the best 2, and returned what I didn't use.
Pros: Don't have any pros at the moment, not able to use 1 of my drives yet in my RAID setup. I guess maybe a pro would be that it's an Enterprise drive and hopefully it will last a long time!? Not the 1 out of 2 already dead, though.
Cons: 1 out of 2 DOA. First power on it clicks and whines a lot for about 30 seconds, then just powers down. Hopefully the 2nd drive will last a lot longer than 0 seconds. SMART says that one is 100%.
Summary: Purchasing hard drives is always a gamble, at least rotational hard drives. I purchased Western Digital enterprise drives for the performance level and the fact that they are enterprise and should out last any desktop drives on the market.
Pros: The drives all worked out of the box as expected. After roughly 3 months of running 4 drives in a RAID 1+0 in an ESXi 5.1 server, one of the drives is not reporting the S.M.A.R.T status. Time to test the warranty / RMA process which failed horribly last time.
Cons: One of the drives is failing to report S.M.A.R.T. data after 3 months of use.
Pros: Ran 2 of these in a RAID 0 configuration for over a year as my OS drive. They ran perfectly and then both failed. WD RMA procedure is quick, easy, and efficient. I've got tons of WD drives in numerous configurations and for the most part they've been bullet proof.
Cons: Both failed within a day of each other, one chirping to a standstill and the other unable to boot and failing WD diagnostics.