Cons: I have now used over 14 WD greens in the last 2 years. I have two servers in two different locations with 4 drive RAIDs. I have had 6 greens go bad out of the original 8. I have become very familiar with the RMA process. Power is regulated in both locations and I have OS drives on each (WD 500GB)...
Cons: I own 4 of these WD20EADS drives for my Thecus NAS and Ive had 4 disk failures in 16 months. The failure rate is so high that I bought a hot spare for my RAID. So far I havent lost any data yet, thanks to RAID5.
Summary: good thing i used this drive in my Windows Home Server and have file duplication on, otherwise i would've lost a bunch of stuff on it. so far i've had to RMA 2 of these drives this year, both were barely more than 1 year old. Don't trust these pieces of junk because of the Western Digital name.
Summary: I have purchased over 30 of these drives over the course of the past year, for purposes of simple RAID1 mirrored volumes, and for backup drives and archiving. I have had over 7 of these drives fail, both in production and in archiving in antistatic bubble wrap and vaulted.
Pros: The Price per Gigabyte was very attractive. Good RMA procedure.
Cons: Too many failed drives, issues sometimes with certain enclosures.