Seagate Exos X20 18TB 7200 RPM 512e SATA 6Gb/s 3.5″ Enterprise Hard Drive – ST18000NM003D (Renewed)

I’ve Never Gotten A Bad One Yet. A “No Cons” Review
Update 2 Days Later:I forgot! Notice, as you read, that these drives are, therefore, completely compatible with Asustor and Synology NAS’s, even though you might get warned that they’re “not on the list”. They work perfectly.I’ve got 4 NAS’, two four bay Asustors, a two bay Asustor, and a four bay Synology. There might be an Iron Wolf or two in them, but they’re pretty much all renewed EXOS hard drives nowadays. The Synology had the smallest drives – Four 10TB EXOS drives. I got these 18TB drives at what I consider an extremely good price. After thinking about it for awhile, I came up with what I thought was the logical thing to do. (all this one drive at a time, of course.) I took two of the 10TB drives out of the Synology and set them aside. I took the two 14TB drives out of the Austor two bay and put them in the Synology. I did that because the Synology has that SHR (Synology Hybrid RAID) option; it does better with different size drives, as far as using all the drive space. Now it has two 10TB and two 14 TB drives. Then I put these two 18TB drives in the Asustor two bay NAS. It’s got a two drive RAID where the drives simply mirror each other for data redundancy. (One of the disadvantages of a 2 bay NAS.) The Synology has an SHR with one drive fault tolerance. So every drive I touched for this swap was an EXOS; NOT an Iron Wolf. Everything totally good to go!! (After about 60 hours.)These drives were very well wrapped in several layers of bubble wrap. They got here VERY quickly (-two days!-) from across the country. The have new white stickers on them, that you’d swear were the original stickers until you see that they say, “Renewed”.There’s all that Seagate stuff: They’re helium filled, making them more efficient because the platters can spin more freely than if there were air in there. Because they’re helium filled, they logically have to be completely air tight or the helium could get out and be replaced by air. Their mean time between fails is listed as 2.5 million hours. They’re SATA 6, which I need. All those NAS’ are 2.5 GB Ethernet except the Synology, which is only dual gigabit. Sure don’t want a big SATA bottleneck. As it is, the drives, themselves, all transfer between 190 and 200 megs per second.I couldn’t care less about the noise, but you couldn’t call them loud; you can hear them. If that bothered me, I would just move the NAS’. What stunned me the most was the enclosed warranty card!! Who does that?!? I scanned it.I can’t come up with a down side! Other than, even at a screaming price, it’s still quite expensive to outfit an NAS. That’s just life. All I ask is that, once I’m done, I’m all set. And I pretty much expect all these drives to outlive me; I don’t run a busy office or a data center. If I don’t experience a severe earthquake or a fire, I’m good!! My stuff is safe! Even if an NAS blows up! Because I tend to put all my stuff on more than one of them.Love these drives! And love the rich guys who are getting rid of them for whatever reason! Maybe they’re all upgrading to 20TB SSD’s?

Just what I was looking for
I needed to update my NAS set up and needed to start off with some decent, reliable drives. It came in and has been working great for about a week without issue. I got a reurb unit an I know sometimes harddrives can be hit/miss, but so far thsi is exactly what I needed at a very decent price. If it continues to hold up well through this migration I’m sure I will get additional drives for some of my remaining bays.

Very good
Very good product

Can’t Go Wrong With A Seagate Drive
I have purchased many a Seagate drive over the years and have had a problem with only one. So remember, Back Up! The only reason I keep buying more of them is they keep getting larger and cheaper. Especially when a renewed one is bought. The first one I bought was in 1994 was 1GB and cost $600. Now this one is 18TB for $200. That is 18,000 times larger. Or, as I like to bore my kids with is in 1994 18TB would’ve cost 10.8 million dollars and taken up a small room kept at 68 degrees.