Customer Reviews: Seagate 3TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST3000DM001)
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on October 20, 2012
UPDATE April 2016
Please note, that Reviews for many very different Seagate drives are mixed together on this page. As such, unless a review specifies which model it is for, it won't necessarily be helpful for the purchase you're trying to make. This review is for a specific 2TB model only. Though it does shed some light on Seagate's general business practices, other drives will differ.

UPDATE January 2014:
Thanks to information from many useful comments, a short update:

1) The problem is still the same as it was. Both 2TB drives are still being sold with the same model number. Due to changes in serial nunbers, depth of the drive housing's indentation has now become the best way to distinquish the drives (see user images - bottom right of Amazon's product page)

2) When I wrote this, I didn't feel up to offering an alternate drive recommendation, as my own opinion is based on personal experience and hence anecdotal. Many people asked, but I only answered in email, without adding a recommendation to the review.

Since Backblaze's (an online data backup company) massive long term test, their blog and extremetech's article based on that (see comments, page 26 for a link), I'll just quote their blog: "If the price were right, we would be buying nothing but Hitachi drives. They have been rock solid, and have had a remarkably low failure rate."

So, is that data even relevant for the average home user? I would say yes, because continuous, heavy use of large numbers of drives is the only way to get any half-reliable comparison. Among consumers, usage patterns are simply spread too wide: if someone only turns on their computer 15 times a year (my aunt), any drive will be the same as any other drive, cause with so little use, they will all last till the lubricant in the spindle dries up, and she'll tell anyone who asks that her drive is great. This inability to compare reliability in the consumer space has bolstered sales of shoddy drives for a long time.

If you do use your computer frequently, installing drives exhibiting a <1% annual failure rate at Backblaze certainly beats installing drives with a 15% or even 120% annual failure rate.

**end update**

ok, so this drive is listed as the "Seagate ST2000DM001" and guess what; other than that it sports 2 Terabytes, it tells you nothing whatever about what drive you'll end up with, because Seagate has chosen to obscure and omit relevant Data between different builds with vastly different performance.

The short advice: Only purchase versions xxExxxxx [and possibly x24xxxxx - x24 is unverified info so far, see notes below] of the 2TB model. This uses 2 platters and 4 heads.
It performs 30% better than the version with 3 platters, which has an xxFxxxxx [or possibly x36xxxxx] designation. Avoid those!

You'll need to contact the seller and ask them to check the code on the drive. If they can't verify, don't buy it, better to get a drive from a different company, where its hopefully not a surprise game of what's in the box.

S - SU - Suzhou China
W - WU - Wuxi China
Z - TK - Korat Thailand

F = 3 platters with either 5 or 6 heads (bad 2TB drive or good 3TB drive)
E = 2 platters with 4 heads. (good 2TB drive)
D = 1 platter with 2 heads. (good 1TB drive)

Weight info received in a comment here, suggests that the 'good' 2-platter drive weighs 534 grams, while the 'bad' 3-platter drive weighs 624 grams.

Seagate used to embed the information about their drives in the model number, but now they obscured it, so they can pawn off whatever they want. Send a WxE model to Publications who test drives, and then ship the crappy WxF model to unsuspecting customers who may never realize they're not getting what they thought they were buying. This should really be illegal.

NOTE 1: This was written for the 2TB drive. It turns out Amazon also shows this review for 3TB drives. This info does not apply to 3TB drives, the 3TB drives always have 3 1TB platters. (or not, there have been reports of 5 platter 3TB versions, if you know anything more, let us know)

NOTE 2: comparison test results - since links get killed in reviews, I'll upload an image to the product page.

NOTE 3: A relevant post on Seagate's forum stating that these Barracuda have been crippled through redesign [see the link in comment 143 below, page 15]
(Apparently, links are permitted in comments)

NOTE 4: Someone commented that Seagate removed any reference to the 2 platter version of this drive in the manual (something which is usually only read after the purchase)

NOTE 5: Someone explained that Seagate made this change due to the flooding of their plant in Thailand. This is not quite correct since chinese 2 platter 2TB drives are also in circulation.

NOTE 6: While the channel still has drives with the numbering scheme as described above, there appear to be at least some drives with a new numbering scheme like "Z240PJB3". Would be great if it read out like x24xxxxx, where 2 stands for 2 platters and 4 stands for 4 heads, then this would be one of the good drives while something like x35xxxxx would be the bad drives. (this is just a guess so far, its not verified)

NOTE 7: Someone added that 2 platter drives (based on other pictures) are 'thinner' with deeper indents on the bottom and top and have a dot matrix code on the bottom right third of the top next to the label. (note that labels are not safe indicators, as they could change an older factory to add barcodes or switch to their latest labeling system any time they wish)

NOTE 8: Seagate has reacted and added more drive info on this product page, advertising "POWER OF ONE" meaning 1 platter per terabyte. This is good news, but that doesn't mean you can relax and just hit the 'buy' button:
a) channel inventory of drives manufactured prior to this "Power of One" initiative will be around for some time to come, so you still need to verify.
b) the specifications sheet Seagate still links on this very page (as of June 28, 2013) shows 6 heads, 3 disks for the 2TB version. With conflicting information, its still a little hard to tell for consumers if they're getting "POWER OF ONE" or "WEAKNESS OF 0.67"

Once Seagate "fixes" their spec sheet info for the 2TB drive which directly conflicts with the "Power of One" advertising, I'd be happy to change my conclusion below. After all, it would mean they decided to be honest and transparent again, rather than hell bent on destroying the reputation of their 'Barracuda' brand.

But right now, what is the point of advertising "Power of One" while saying their 2TB drives have 3 platters with 0.67 TB at the same time.

Seagate's real reason to obscure drive information is being able to use lower bin or older tech platters that can only hold ~670 GB, so they use 3 platters. This is a fine business decision, but an honest company would give it a new Model number/name, as its a different product with lower speeds, lower reliability and higher weight.

But why be honest, if you can cheat and make a few dollars extra per drive, by selling it under the same name as the better drive, which has been reviewed extensively and lauded for its higher speeds?

Last Update: June 28, 2013 (in response to Seagate's new additions to this page and with thanks to Alex and J. Goodman)
review image review image review image review image
386386 comments| 2,891 people found this helpful. Was this review helpful to you?YesNoReport abuse
on March 27, 2014
This drive failed without any warning on March 26, 2014--the dreaded clicks. Amazon showed I bought the product on September 3, 2012 and the product page stipulates a limited 2-year warranty, so I decided to get a warranty replacement. However, Seagate's warranty check stated that my warranty ran out on September 29, 2013. Upon calling Seagate's customer service, I was informed that this product only has a 1-year warranty. I am currently contesting this based on the clearly visible information on Seagate's product page that this product has a 2-year warranty. I trust Seagate will take appropriate action to remedy this inconsistency in their warranty validation database, but if not, I wish to warn Amazon users here that the warranty period listed for this product (and perhaps others) is incorrect.

Update 1: After sending documentation about the stated warranty period, Seagate agreed to update their warranty database for my particular case. (Although, scanning through more recent reviews, at least two other users already had this problem, so I don't know why the remedy wasn't global for this product line--one wonders if Seagate hopes most customers won't bother with contesting the warranty period). The response to the documentation was quick, which I appreciated. However, although they said the fix will propagate in 4hrs such that the RMA can be generated, it's been 9hrs and the validation tool still says my HDD is out of warranty. I'll leave another update once this makes progress.

Update 2: Twitter customer support is the way to go. I contacted @AskSeagate overnight, and once they woke up they sorted out my problem in relatively short order with appropriate ETAs for fix. Still think this HDD is not what it's made out to be (and the warranty info isn't fixed as far as I can tell) but added one more star for efficient customer service once you reach the right channels.

Update 3: Unfortunately, the HDD did not get shipped out within the period advertised (chose advance replacement). Downgraded to 1 star.

Update 4: The replacement HDD was dead on arrival (clicking already). Would downgrade to 0 stars if I could.
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on January 17, 2012
This is one of the select few 3TB drives approved by Synology for use in a variety of their NAS devices, so I put 4 of these in a DS411 in SHR with one disk redundancy (basically RAID 5). While anyone will tell you enterprise hard drives are better in RAID 5 or 6 configurations - and they are right, for the most part - it's hard to deny the big price difference in going enterprise: 3TB enterprise drives are well over $550 right now due to the recent Thailand flood and it may be some time before that price drops significantly. While these drives weren't as cheap as the 3TB WD Caviar Green varieties, I will NEVER put Caviar Greens in a RAID 5 again, so the ST3000DM001 quickly rose to the top of my admittedly short list.

I think it's important to point out that IntelliPower (WD) and CoolSpin (Hitachi) technologies are not really ideal for any kind of RAID array using parity. WD Caviar Green drives, especially, are known to sometimes not power up when needed, ultimately resulting in them getting dropped from the RAID array. A good NAS like the DS411 will put the drives into hibernation after 10 minutes of no activity, so you don't really need the benefit of "eco-friendly" drives in this kind of RAID anyways. Plus, with 7200RPM you will get speed improvements, so it's a no brainer to pick a drive like this over those.

That said, of course these do not have TLER, RAFF and other advantages of enterprise-class drives. So you run the risk of more errors, RAID rebuilds and potential failures by choosing a consumer drive like this. But even though the risk is greater, it's not really worth the extra money to go to 3TB enterprise-class, so I feel this is a good compromise of risk vs. value.

UPDATE - 7/12/13

I felt I should come back and update this review (and my rating) due to 2 of these drives encountering bad sectors and getting dropped from my RAID volume within a 1 month period of time. It took over a year and a half for this to happen but it's still an unacceptable loss ratio in my opinion. I still did not encounter that dreaded second disk failure while rebuilding my RAID5 with a new drive - both times the rebuilds completed without a hitch. Once again, that situation has not happened in my 15 years of professional IT work. I ended up going with the WD Red 3 TB NAS Hard Drive: 3.5 Inch, SATA III, 64 MB Cache - WD30EFRX to replace the Seagates. Although Synology and other NAS manufacturers ignore the TLER timings in enterprise drives and implement their own, I feel the Reds (and by extension the RE's) are better suited for NAS usage and will be more versatile should I choose to put them in different RAIDs or NAS's in the future.

So in summary, I can't really recommend these Seagates anymore after my personal experience and the drop in price in the WD Reds.
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on April 17, 2012
I've dealt almost exclusively with WD for the last 10 years....I had a string of bad luck with Seagate before that, and had sworn off of them. Well, times have changed, and I'm willing to see if Seagate has improved over the years. Post-flood WD seems to be sticking to the absurd prices after other makers are slowly going back down to reasonable prices. And I have to say price played a BIG part in these recent purchases...I REFUSE to pay more for a WD GREEN drive than I did for a Black drive twice the size a year ago...I just refuse.
In a non-raid environment, this 2TB drive seems to be snappy, worked out of the box, and has had no far so good. Just ordered 2 of the 3TB variety on the strength of this one.

I've been seeing A LOT of neg reviews lately for ALL manufactures in ALL price ranges, it's my belief that the many DOAs have more to do with how the drives are handled in transit, than quality control. I've SEEN the way carriers toss the packages around to get to others, and have even seen them STAND on bubble wrap is going to compensate for that kind of abuse. Still other complaints I've seen have more to do with ignorance than anything...who in their right mind expects to drop a 2TB-3TB drive in a 10 year old machine and expect it to work out of the box, without using the manufactureres tool? Or expects lightning speeds when a SATA 6GB drive is plugged into a SATA 1.5GB port? And if I read one more review where a clueless person can't understand why a 3 TB reports as less than 3TB in Windows...I'll scream!

I think it stinks that warrantys have been cut, and there is still the question in my mind if post-flood drives are being rushed out to meet demand before factorys are up-to-snuff, or if all that fresh new equipment means a better product....guess we'll see.
From a one week perspective, I have no complaints with this drive. In the weeks to come, if I DO....I'll let ya know.

Update : 4-17-15
So far all Seagate Drives purchased (Currently 6: 2 - 2TB , 4 - 3TB ) all working flawlessly. Two of the 3 TB drives are 2 wks old, all others 3 yrs old. My rating sticks at 5 stars.
Putting to rest my last WD drive....popping bad sectors right and left, and it's a replacement of a replacement drive that has exhausted the original drives warranty. Have to say, speed and reliability has put Seagate in the #1 position as my drive of choice. WD drives were sluggish in comparison, and the 5yr warranty on the PREMIUM PRICED Black drive is not worth much if you are having TO USE IT FREQUENTLY THE WHOLE 5 YRS.

GRIPE: The last 2 - 3TB drives I just bought, only carry a 1 yr warranty (the first 2, same model carried 2yrs) . Been in this game long enough to know you can get a lemon with ANY brand... so a 1 yr warranty is just too darn short for any price. Not sure I like the trend of making mechanical hard drives "disposable" via short warranties, or charging extra for same specs....but longer warranty....especially when all you get with that warranty is a recertified drive that is warrantied for only the remainder of time left on original drive.

Waiting for the day when SSD's become as large and affordable as mechanical drives.... in 5 yrs of SSD use, I've yet to have one single error (much less failure) on a SSD drive.
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on November 26, 2014
I use this Seagate 3TB HDD in my NAS device, which is one of its expected usages.
It had been working fine but suddenly died only after 2- years of use -- it starts with some strange mechanical noise. I understand this could happen to anyone if one happened to come from faulty lots,
but still it was a big disappointment. I removed the drive from the device and put a mark "dead" on top of the seal as a note.

Then a few days later I realized that the drive is still under warranty, just a month before its expiry.
I tried to file a warranty return, but the representative pointed out that my "dead" note on the seal would void the warranty with no reason but SEAGATE's POLICY. I don't think this mark makes any difference in terms of hard drive's mechanical state. The representative even responded to my complaints that no one complains about this policy because everyone knows it.
Do we? I bet they just try not to accept a return as much as possible by creating lots of user unfriendly policies.
So be aware. The drive could fail soon; but even worse, you may have a hard time to get a replacement even if it is under warranty.
I will never buy a product from a company to do this type of business.
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on January 27, 2015
I have purchased over 20 of these drives over the course of a year for use in a media server and a couple of gaming rigs. The media server runs 24/7 but the drives spin down when not being accessed. Also, it is just serving video for our family so the drives are accessed when discs are being ripped and then when video is being viewed. That is to say, a maximum of 4 hours a day of drive activity, and that would not be on just one drive but across all 16 drives in the server.

No drives arrived DOA. All lasted at least 12 months, although I regret not running HD Tune during that time to check for errors that were building. After 12 months, 2 drives died suddenly (no SMART warning) and became unrecognizable by any computer. I just noticed data choking when being read off of two other drives After running HD Tune. I found that I actually have 4 of the remaining drives failing with significant number of bad sectors being remapped and other errors indicating imminent failure.

The bottom line is that these drives are junk.

The performance, when they work, very good, however.

UPDATE - after over 2 years of use, I have two left working. Seagate is no longer on our approved vendor list.
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on June 25, 2014
I ordered 5, and 2 were bad! One won't even spin up the platters, and the other keeps disappearing from the computer until power is cycled. How were these even tested before they left the factory?!

I didn't have time to try these until a month after I purchased them, so now I have to RMA through Seagate instead of Amazon. Of course, they'll give me "fixed" drives in return, I have to pay for return shipping on brand new failures, and they require a signature for delivery. Delivery signatures are one of my pet peeves, as I work weekdays.

I can't believe these have a 4 star rating on Newegg when Western Digital red drives have 3 stars. This is my first and last Seagate purchase.

EDIT: 8 months after original purchase, one of the "certified refurbished" drives that seagate sent me in an earlier RMA keeps disconnecting from the computer. Swapped drives to a different port, different cables, and the problem followed the hard drive. I am now doing a 3rd RMA out of the 5 drives that I own.

Seagate is not worth it. The cost you save during initial purchase is nullified later when you pay to ship RMA's and waste your time. I should have bought Hitachi.

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on November 11, 2012
**UPDATE 2/18/13:
Since the last update I have:
1. completely filled the drive with data
2. deleted large, random areas and rewrote to those several times
3. run complete sector scans after each major overwrite operation
4. loaded and used numerous files from random areas with no problems
5. completely wiped the drive using CCleaner (3x overwrite), followed by SeaTools, followed by a complete sector scan

This was rather time consuming, as you can imagine, and it worked the drive pretty hard.
The number of bad sectors remains at 64. There is evidently no significant problem with the heads, if at all, so it's looking like there's a small area of a platter that's defective, which required some use to reveal itself. Hopefully, that's the end of it, though I still find it difficult to fully trust this drive.

** UPDATE 1/23/13:
I installed the drive on the new Windows 8 machine, wiped it and set it up as a single 2.794TB partition (you must initialize the drive as GPT instead of MBR, folks! Link to more info is in comments). There have been no additional bad sectors since #64 weeks ago. However, this is most likely due to the fact that the drive is now squeaky clean. So, the next step is to dump massive amounts of data on it (e.g., batch writing video files to numerous folders) and see if it throws more bad sectors (S.M.A.R.T. reallocation).

** UPDATE 1/6/13:
Sadly, my drive started throwing bad sectors after day 45. Ininitally, there were 36 bad sectors at once that came out of nowhere, and it stayed at 36 for a good while, but it has been dropping sectors at a rate of about 10 every week since then.

By HD Sentinel's calculation (default settings), the drive is now at 36% health. On some boots, HD sentinel shows 6-7% health, with 65k+ sectors being reported as "weak" -- a retest clears this and it returns to the previous health.
From 100% to 36% health in 2 months is cause for concern.

The unit hasn't been touched since installation, and the pc is not a LAN machine, so it doesn't get moved (i.e., shock is not the cause).

Since I needed to build a new pc for another room anyway, I'll install Win8 on the new machine's SSD, install and wipe this Seagate drive and then run a complete/long sector scan on it and see what happens.

I've deducted 2 stars for the alarming bad sector trend and will deduct another star for every 10 additional sectors that go belly up (until I'm down to 1 star, of course). I suspect it won't take long for that to happen.

I'll be back to update the continuing saga...

Original review follows:

I purchased this drive for use with one of my legacy machines (a 2003 P4 3.0c), as I had finally reached the point where the old Seagate 320GB drive was stuffed full and I ran out of things I could afford to delete. The price/size/performance numbers of this drive are excellent, so I pulled the trigger.

~~ The packaging ~~
Some reviewers mention inadequate packing. I believe this generally is only a problem with 3rd party sellers. I have yet to receive an inadequately/unsafely packaged item which was "sold and shipped by Amazon". I have had problems with dealers who sell through Amazon, however.
Stick to the items Amazon itself stocks and you will likely have less of a problem, especially with fragile items like hard drives.

My drive shipped with form fitted, soft plastic end cups for support and sealed in the factory anti-static bag -- just what you'd expect with an OEM drive. It was double boxed with airbags at one end.
It arrived safely and I've had no functional problems with the drive in the 250 hours I've put on it so far, after having run it through my torture test, which includes a great deal of sustained, heavy defrag operations.

~~ Quiet and cool ~~
The drive is virtually silent when it isn't persistently spinning down for power-saving and parking the heads. I describe how to put an end to this later in the review -- to skip the section on getting the 3TB in Windows XP, look for the "~~ That most annoying head parking, and how to stop it for good ~~" section near the bottom of this review.

Left fully on (no power-saving), my drive temp reads an average 31°C -- I have a fan in front of my HD cage, but I keep the room this pc is in relatively warm, so YMMV greatly here. In comparison, my old Seagate 320GB drive reads an average 37°C.
My old Seagate drive is still going strong (96% health) after 38,092 hours.
I hope this new drive fares as well.

~~ First order of business: scan your drive! ~~
Some people are having problems with >2GB drives in legacy systems.
I'll describe how I freed up the full 3TB in XP in a moment, but the first thing you should do before using ANY new mechanical hard drive is perform complete sector and S.M.A.R.T. scans to make sure you have a 100% healthy drive to begin with.
So, before you partition and format the drive, you should visit Seagate's website support section and download the SeaTools and DiskWizard utilities -- get both Windows and DOS (CD boot) versions of both programs. Burn the CD boot versions to separate CDs.
You may need to change your BIOS settings to boot the CDROM as the first device in order to run these DOS programs.

Verify you have a good drive by using SeaTools DOS S.M.A.R.T. and LONG tests.
You may be able to get Windows version of SeaTools to cooperate, YMMV.
While in SeaTools, you can check the drive information for such things as temperature, power on hours, etc.
I have my doubts as to whether the power on hours will tell you whether the drive is actually an unmarked refurb, since the factory could just reset these specs (firmware wipe) and you'd be none the wiser. At any rate, it's there for the viewing.
The latter test takes a LONG time (whoda thunk it from the name, huh?), but you want to be sure you have a good drive, right? Right! So be patient, it's worth it. After you're confident you have a perfect drive, you can proceed to setting up the drive for your system.

Boot up Windows -- you may need to change your BIOS boot order, YMMV.

~~ The 2TB limit ~~
Seagate's website support section offers plenty of material regarding >2TB with Windows XP, but for those still having trouble, here's how I freed up the full 3TB and cloned my multi-boot 320GB onto this new drive:

1. Go into XP's Administrative Tools>Computer Management>Disk Management and format the unallocated 2TB drive (I chose NTFS). This step is necessary if DiskWizard cloning function in Windows doesn't work for you (as it didn't for me) -- and the DOS version doesn't format in NTFS.
You'll only have access to the first 2TB for now, because XP (32-bit at least) doesn't recognize >2TB. Do not partition this 2TB yet, especially if you want to clone your old drive onto the new drive.

2. Shut down Windows, Boot DiskWizard CD (change BIOS boot order, if necessary) and use the Extended Capacity Manager. This effectively creates a separate hard drive, which will end up showing about 750GB available after formatting. You may be able to use the Windows version of DiskWizard's Extended Capacity Manager, but my XP SP3 didn't cooperate until I had set everything up using the DOS version, YMMV.

3. After confirming you now have a 2TB (≈1.97 available) drive and an ≈750GB drive, you can proceed to clone your old drive (or format the Extended drive if you wish; this won't matter unless you're cloning a >2TB drive). The Windows version of DiskWizard's clone function refused to work for me, YMMV. If it doesn't work for you, you'll need to use the DOS CD bootable version.
I used manual mode because I wanted a larger c:\ multi-boot partition than my old drive had, but you can use automatic (exact copy) mode if you're squeamish about these things.
What you need to remember about cloning is that it duplicates EXACTLY, sector by sector. If your old drive is heavily fragmented (like mine was, due to my lack of diligence) and you don't have enough free space on your old drive to defrag it (like I didn't), your brand new drive will be fragmented in the same way as your old drive (the horror!).
So, I cloned my 320GB onto the largest (2TB) portion of this new drive and defragged the new drive after the fact. Then, not wanting to delete most of my original/backup drive in case something horrible happened to my new drive due to Murphy's Law, I merely cleaned up my old drive enough to give me >15% free space (e.g., I deleted XP) and defragged what was left on it, leaving me with nicely defragged drives.
I know, not ideal, but as I said earlier, I had run out of things I could do without on the old drive and thus could not defrag it prior to cloning, which is something you SHOULD obviously do if you have sufficient free space for the task.
Yes, I could have made tons of backup DVD's to obtain enough free space for defrag operations, but the above method worked, probably about as quickly, and it saved my DVD blanks.
Cloning takes a long time (in my case on this legacy machine it took about 1.5 hours for 320GB), so grab a snack, go watch a movie, etc.

4. Having freed the last TB of your new drive, you can go into Administrative Tools>Computer Management>Disk Management to confirm the drives are all present and you can format this last TB to your liking. The last TB will appear as a separate physical drive. While in Disk Management, you can change the drive letters and names as desired (you cannot change the physical drive NUMBERS in Disk Management).

Performing the above left me with 3 "physical" drives: This new drive with 2 partitions, the original 320GB drive and the last TB of the new drive.

~~ That most annoying head parking, and how to stop it for good ~~
That scraping noise you're hearing is NOT A DEFECT! Please do not send this drive back based on this noise -- doing so only leads to the marketplace being swamped with refurbs because there was nothing wrong with the drives!

The noise is a result of Seagate's power saving design, which spins down the drive to a slower platter speed and parks the heads during periods of inactivity.
A huge problem with this concept is that Windows, at least XP, won't leave the drive alone long enough to make parking viable, as it's accessing the hard drive frequently, even when the user is doing nothing on the pc and all TSR programs are closed! Thus, this parking/scraping noise is very frequent in some cases (average interval was 30 seconds in my case).

This is the only noise I've heard coming from this drive, and it was as bad as if not worse than fingernails on a chalkboard (the horror, part II!). I even resorted to creating a script which would frequently read a bit from the drive in order to keep it constantly active.
If I had not gotten rid of this annoyance, I would have returned a 100% healthy drive for this reason alone. Are you listening, Seagate??

Fortunately, you CAN stop this irritating behavior, at least with certain firmware versions. The drive I was sent was made in Thailand, dated 08/12 with firmware version CC43.

Now, the good stuff (at last).
Download Hard Disk Sentinel (hdsentinel dot com).
In addition to providing you with more info than you ever wanted to know about your drives, the trial version will let you change the APM (Advanced Power Management) setting for this drive (with CC43 firmware at least; YMMV with other versions, but they should also allow it).

Not wanting to completely do away with all power savings, I tinkered for a while and discovered that an APM level of 128 stops the parking/spin down noise. Levels lower than 128 do not stop the noise, they progressively increase the spin down level, which in turn increases the time it takes for the drive to spin up to normal platter speed; you can hear this as you set the level to lower and lower numbers.
Levels higher than 128 also stop the noise, but they result in progressively less power savings.
Imagine that, if only Seagate had shipped this drive at default level 128 instead of the 125 it shipped with, few people would be complaining about this issue!

~~ Final verdict ~~
This is a highly recommendable, virtually silent drive with plenty of storage space and excellent price-size-performance numbers.

Speaking of numbers, compare this drive to the much revered and coveted WD Black:
Seagate 3TB (ST3000DM001): max sustained 210MB/s
WD Black 2TB (WD2002FAEX): max sustained 138MB/s
Seagate 3TB: latency 4.16ms
WD Black 2TB: latency 4.20ms
Seagate 3TB: seek time read <8.5ms, write <9.5ms
WD Black 2TB: seek time ?? (not available, on their website anyway)
Seagate 3TB: 24dB idle, 26dB operating
WD Black 2TB: 29dB idle, 30dB seek mode 3, 34dB performance seek (mode 0)
Seagate 3TB: operating 8W, idle 5.4W, standby & sleep .75W
WD Black 2TB: operating (read/write) 10.7W, idle 8.2W, standby & sleep 1.3W

Reliability/integrity specs are identical. The only thing the WD Black has going for it is its additional 3 years of warranty coverage -- no, that's not a typo; I ran a warranty check on my new Seagate 3TB and it came back as 2 years, not 1.

Better performance with 1TB more storage than the largest WD Black. My previous experience with Seagate, combined with the above comparison sold me again on Seagate.

Seagate just needs to tweak their APM a bit to prevent unnecessary returns and bad feelings about Seagate "green" insistence (yes, I know other manufacturers also use APM). I should deduct a star due to the effort the end user must go to in order to quiet the annoying APM noise, but I feel the above positive aspects make up for this.
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on November 28, 2011
VERY IMPORTANT: On Windows 7, 64 bit OS, be sure to download the newest version of Intel's Rapid Storage Technology (Intel RST) drivers from Intel's site. 10.1 or higher. You need to do this before formatting drives. [...] Also if this is a second storage HDD you'll most likely need to purchase a SATA power cable. Have always had excellent results with seagate drives!
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on May 18, 2012
There are a LOT of reviews about this drive (ST2000DM001) that say that it fails, or that it will fail very soon or something similar.

Now, I've only had mine a month, but in that month, it has worked exactly as expected. I pulled my 3.5 year old (dead) 750GB drive (which, I might add, is the first Seagate drive I personally ever had fail out of probably 20 - though I've had a LOT of all types of drives fail at work) and replaced it with this one. I then resilvered my RAID-Z in my server and within 12 hours or so, that completed. I then scrubed the zpool. The next morning, everything was exactly as expected.

No failures. No errors.

I have no idea if this drive is going to last for 3 years or so (what I would consider a decent lifespan for a rotational media drive in a server running 24/7), but so far, so good.

No clicking.

No errors.

It's just running as expected.

I wanted to write this review simply because hard drives like this aren't exactly sexy. If they work, they work. If they don't, you go on line and bash the manufacturer. I'm sure that there are several drives (perhaps more than "normal") out there that failed. But considering how many of these things they make/sell/ship, you're still not very likely to get a bad drive. Even though when it happens to you, it's not fun AT ALL.

So, mine works. Could that change in 6 months? Yes. Absolutely.

Will I be back to update this if it fails? Yup. Definitely.

In the mean time, I'll probably pro-actively replace the other 2 750gb drives in my RAID-Z with two more of these HDD's - once prices come down a bit more towards their pre-Thai-flood prices.

Update (11 Sept, 2012): Nothing new to report. It still just works. Running 24/7.
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