Summary: I would have given a 5 star on this drive, but it came shipped in a DELL drive chassis. I would have preferred a bare drive so I could have dropped it right into the old drive frame. However, the drive is working flawlessly and we couldn't be happier with this purchase. Thanks for the great price and fast shipping.
Summary: Drives perform well but are just a slight bit louder than we would like. Could have sacrificed a bit of performance for Seagate's NAS series of drives (the non-enterprise/constellation line) which are designed for use in homes. We upgraded from a pair of WD Green drives to the 3TB constellations for greater space and performance. Drives run in a Synology DS214+. The SmartRPM drives are quieter.
Summary: I bought 20 of these for a SANs storage. The ones that work from the start are still working great in my SANs (DSN-3200 by D-Link). There were 4 units that came dead. The reseller replaced them quickly so there wasn't a major issue. It does makes me worried that 20% of the units came dead.
Summary: I purchased 5 of these to replace end of life drives also by Seagate. The drives received were branded Dell. They were to be used in a NAS server and so far one is working well with no problems. I also checked the warranty on-line and it proved to be what it should. This drive appears to be a direct replacement for the ST31000340NS.
Summary: Bought two of those to run in my Synology DS1010+ NAS. So far the drives perform very well. The larger buffer (64MB) and the higher rotation speed (7200rpm) are noticeable. The only thing that keeps me on my toe's are that the drives if not idle continuously run at higher temperature than my old drives. Bought them from Amazon in OEM packaging. No complaint here. Excellent protection upon arrival.
Summary: Excellent drive thus far (6 weeks usage) .... let's see how it lasts longer term. As usual, quick delivery. Pricier than I like (hence only 4 stars) but if it performs for 5+ years it will be well worth $$$ for critical server data storage.