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Item#: N82E16822178379

Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

  • Backed by a 5-year limited warranty
  • Solid state speed for fast, responsive system performance
  • Innovative use of solid state memory delivers affordable performance and capacity
  • NAND Flash and HDD technology

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  • Warranty & Returns
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Learn more about the Seagate ST4000DX001

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the Seagate ST4000DX001

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4 out of 5 eggsGood Value and Good Speed for a HDD, but SSD Performance? Not So Much.

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: This product does offer a measurable performance advantage over conventional spinning disks, as claimed. But your mileage will vary depending on what you actually do with the drive. This is a unique product that gives you a very small solid state disk (SSD) and a very large conventional hard disk drive (HDD) bundled together, which the computer sees as one drive. Trick firmware allocates which files go on which for you, automatically. If you only need SSD speeds for a very small proportion of your files, this could be a best-of-both-worlds arrangement.

Physically, the drive is about what you’d expect from a contemporary spinning-disk hard drive. Dimensions are identical to any other 3.5" hard drive you have owned. Acoustic properties are very good, with no noticeable no buzzing, whining, or clicking on long sequential writes. Thermal properties are par for the course. I threw 1.5tb of data on it in a 3-hour sequential write with the drive in a “toaster” style drive dock (exposed to ambient air, no fans) and recorded 103ºF max surface temperature after an hour in comfy 63º ambient conditions. One hour later, no change. So far so good.

Cons: This product suffers from confusing, even skirting disingenuous, marketing. You really need to read to figure out what exactly is being sold here. This product is a 4tb conventional spinning hard drive (HDD) with a 8gb NAND solid state flash storage device integrated into it. If the data you seek to access is stored on the HDD, it is accessed at speeds you would expect for a decent-quality 7200 RPM hard drive, including spin-up and seek time. If the data is stored on the SSD portion of this product, it is accessed at speeds you would expect for a NAND flash device (i.e. stupid-fast). The question that will immediately come to mind for potential buyers is “how often can I expect SSD speed versus HD speed?” This is a critical question, as the NAND flash represents a mere 0.2% of the total storage offered by the device. Seagate explains that "a set of advanced algorithms” running within the drive’s firmware handles the allocation of files between the two storage devices. Essentially what is happening here is that the drive is keeping a running tally of what files are popular, and keeping those files in the flash memory. The flash acts like a gigantic cache for your "greatest hits" files. The rest of the drive is no faster than a conventional 7200 RPM drive, which most certainly does not “perform like an SSD,” as Seagate suggests in the product feature list. If you are expecting 4tb of storage that offers SSD speeds, you will be disappointed, because that is not what this product provides. While it very well may offer accelerated boot times if you use it as your system drive, this drive cannot pull off other tricks that people expect of solid state drives, like the ability to play back large video files. 4k footage of any variety is a no-go. 2k doesn’t make the cut, either, and nor does 1080p24 at 16-bit (4:4:4). In fact, you need to drop all the way down to 1080p24 10-bit (4:2:2) footage to find an uncompressed video format that this drive can play back in real time. In this regard, it’s comparable with other high-end HDD’s, and is not even playing in the same league as SSD’s.

Other Thoughts: Of course, a 4tb SSD doesn't even exist as of this writing, and SSD storage costs around $0.33/gigabyte, whereas this product is over 4tb formatted and offers this massive storage at a tenth of that cost. I would speculate that the scenario Seagate engineers had in mind for this product was a single do-all drive for a home user, in which the drive is hosting 100% of the user’s data, including the OS. Thus the OS would invariably land on the NAND flash, giving the user SSD-like boot speeds, and perhaps improved commonly-used application launch speeds as well. In this case, this unusual configuration of a tiny SSD and a big HDD would represent an ideal storage solution. In other use cases, this drive falls short. I formatted it Mac OS Extended with a GUID partition table (the drive arrived unformatted) and installed it in my video post-production workstation. My use scenario involved using it as a bulk storage drive for project files, while my operating system and scratch space were each allocated to separate true SSD’s. I replaced a Western Digital 2tb “Black” (WD2002FAEX) drive with this one. Using the BlackMagic Design disk speed test tool, the WD drive topped out at a sustained write of 116.5 mbps and read of 118.3 mbps. The Seagate swung 135.8 mbps read and 135.3 mbps write on this same test. So, this drive is no slouch, but it sure as heck isn’t a SSD. The cheapest “bargain-brand” SSD I have ever tasted nailed 227.2 read on this same test, whereas my primary drive, an admittedly quite expensive OWC Mercury Elite, delivers what I paid for: a staggering 497 mbps write and 515.2 mbps read.

With the drive loaded with data but still brand-new, I ran the Blackmagic speed test repeatedly in an effort to get the firmware to allocate it to the NAND flash portion of the drive and get a sense for what this product might offer at its fastest. It did in fact get faster, getting up to 155.8 mpbs read and 156.1 mbps write. This is the fastest I have ever seen single 7,200 RPM HDD go. But it is still nowhere near SSD speeds, nor speeds that can be achieved by two conventional HDD's in a RAID 0 configuration.

Qualitative real-world use over the course of a week does show a fast, responsive product by the standards of a 7,200 RPM HDD. It is noticeably quieter than the WD drive it replaced, but there is no perceptible speed change. Annoyances like latency introduced by needing to spin up the drive when you hit an “open” dialog in a program are still present.

The long and short of it is that if you have a VERY minimally data-intensive workflow but still need massive storage (think family email and web browsing box that also hosts a big pile of media) , and intend to make this your one and only drive, it may represent a very good value to you. It will deliver better-than-HDD speeds overall, and provide massive, inexpensive storage in one convenient package. For users on small form factor machines that can only accommodate one drive, this product might be a uniquely appealing option. But most users will find that the 8gb of flash memory included here is wildly inadequate to provide anything resembling SSD performance. I’m not sure why Seagate decided that 8gb of NAND flash was satisfactory in an age when everyday apps like iTunes weigh in a 300mb. 8gb is far inadequate for most modern operating systems as well, so while I don't doubt that boot times are improved, I question the claim that boot times are in any way SSD-like.

Bottom line: this product offers great speed for a conventional hard drive, and is a really nice value, but it doesn’t even begin to perform like a true SSD.

I would add to this conversation that I have had checkered experience with Seagate hard drives over the years, and I can’t find published MTBF (mean time between failure) data on this product anywhere online. There are two storage devices in this product, each with it's own controller, plus some kind of extra controller to run the firmware. Added hardware complexity generally doesn't do much to improve reliability. So far so good in my short experience with this product, so I can't hold these qualms against it, but suffice it to say that none of this inspires confidence. I would advise users who prize reliability above all else to avoid this product until the manufacturer publishes MTBF statistics, or online user reviews offer this data anecdotally.

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4 out of 5 eggsHybrid HD

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: 64MD DRAM Cache
NAND 8GB (MLC)
SATA 6Gb/s interface
standard 3.5 in drive for desktops
5 Year warranty
8 Heads / 4 Disk

Cons: Over all size is rated at 4Tb when its formats out at 3.63Tb,

Other Thoughts: speed testing I averaged about 165MBS for read and write using ATTO.

as you use the system it will keep the HOT (used a lot) files in the 8GB NAND to speed things up over time, as file are access over and over again. Other wise drive is as fast as a typical drive. Copies of file went fast after they were flagged a HOT files during the 2nd and 3 time moving over the other Drive or opening then images up in Photoshop.

I used this as a storage drive, not the main OS drive as that is a m.2 SSD,

system used: GA 170X Mobo, i7 6700K w/ Corsair h100 cooler, 16BG Ram, 500GB m.2 SSD OS drive. Seagate 4TB storage for review.

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4 out of 5 eggsSolid spinning HDD!

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: - Lots of storage space
- Seems reliable for the time I've been using it
- Runs fairly quiet and doesn't get too hot
- Slightly faster data transfer speeds than a non-hybrid spinning 7200 RPM drive

Cons: - not as fast as an actual flash-based SSD

Other Thoughts: - All in all, I'm happy with this drive. I have been using Seagate 1 - 4TB drives for 10 years now in a professional capacity (3D design, video editing) and I've never had a drive fail. Hopefully this drive will last a long time as well.

- If you can get this drive for the same, or slightly more than a standard 7200RPM spinning drive, then it would be worth it. As other reviewers have noted, do not expect near-SSD speeds with these hybrid drives.

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4 out of 5 eggsGreat storage.

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: Great amount of storage.
Speed appears to be on our with 7200 RPM.

Cons: Not in the same ballpark as SSD. Price is Meh.

Other Thoughts: Used strictly as a storage device.
Did not want the OS on such a large drive.

Used in a 3.0 enclosure.

Kudos to the reviewer who listed the nyko databank.
Thier website listed 2TB as the Max.

Think It will find a happy home as PS4 storage

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4 out of 5 eggsSeems to be a great drive

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: Fast access times (170MB/sec average)
Speed boost for frequent programs with the SSD portion
Tons of Storage space

Cons: Bit of an issue because of the size. Initially only had 2 tb usable. Drive needs to be set up as a GPT drive, not a MRB drive. A quick command prompt and diskpart utility in Windows fixed it though.

Other Thoughts: I am using this as a primary drive from my home server (WHS 2011).
I went from a 128 gig SSD boot drive, 2 tb WD Green for primary storage and 500 gb drive for tv recordings, to having everything on this and using the older 2 tb drive as a backup.
Since this thing only gets booted once a month or so, having the SSD was no real advantage. With this drive, I am getting quicker boot times than what I was with a WD green 640 gig drive, but not as fast as the SSD (but again, not a issue for my use).
Since all my stuff is remotely accessed, I have no idea if this hybrid drive is "faster" or not, but for my needs, it seems to be doing just a good as 3 separate drives.

Benchmark results from HD Tune
Transfer rates:
Minimum 107 MB/s
Maximum 188 MB/s
Average 170 MB/s
Access time: 11.1 ms

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4 out of 5 eggsIf it lasts, not bad.

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: Very large amount of space.
Reasonably quick file transfers.
Cheap.
5 year warranty
Faster than conventional hdd.

Cons: Still not as fast as most ssd's (even the cheap ones)
Could potentially be used as an OS drive but most would rather ssd's at this point.
SSD's are more worth the investment if speed is your primary goal.
Long term reliability questionable.

Other Thoughts: Obviously this drive has a large amount of space. This is nice for the price. I would recommend using this drive as a gaming drive (particularly if you play a lot of the same games over and over). The 8gb cache on this thing will allow windows to load much faster than a standard hdd but not quite as fast as a stand alone ssd. I would still use an ssd for my os and all my games on this drive. It will allow you to get the best of both worlds. So maybe you buy an ssd, and a 2tb version of this drive? Might be a little more money but worth keeping them both for the speed. The 5 year warranty is a nice but recently I've been worried about seagates reliability. I have been hearing horror stories (this drive included) about even short term reliability in seagates products. I don't know if in the last 10 years or so they changed manufacturers or suppliers of internal components but it seems as though they've lost an edge they once had. If I were to buy an hdd right now, it would probably not be a seagate due to droves of people fleeing for more reliable manufacturers. This says somthing as I have been a seagate fan my entire life (32 years) and have never used anything else (until ssds, of course). I average about 144mb/sec with hd tune. Keep in mind I'm still on sata 2. I will also say that I average 172 with my ssd. If your willing to risk using your 5 year warranty and want faster loading of games than just a tradition hdd, then go with this drive. If you want the fastest load time there is, pay more for an ssd and get equal or better long term reliability with none of the noise and all of the performance.

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4 out of 5 eggsA mixture of the pros and cons of both SSD and standard HDD

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: + Quick boot into Windows
+ Definately beats out a conventional HDD in terms of speed and read/write rates
+ 4TB of space, an SSD costing the same would be a fraction of the size
+ Draws less power than some of my other HDDs
+ 5 year limited warranty is nice

Cons: - It is still no where near an SSD in terms of access speeds. Even for hot files stored on flash.
- Suffers from the same durability issues as a conventional hard drive. If you drop this, you're going to have a bad time.
- Failure rate would be similar to any other Seagate 4TB drive as it still depends on the 4 platters and the 8 read/write heads total.
- Average read/write rates are far below an SSD.
- 4K Random Read/Write speeds are at HDD levels. Not unexpected.

Other Thoughts: Sequential Read I got around ~155.28MB/s. Sequential Write I got around ~143.79MB/s. This is still faster than some of my other 4TB drives, but not as good as my SSD.

Really the benefit of the SSD speed really only kicks in for hot files or commonly accessed files. Everything else, expect standard 4TB HDD speeds.

I still wouldn't consider this drive for an OS drive. But for a data storage drive in which you are commonly accessing files, over time this can be worth it if you want a little bit of a performance boost over a convention 4TB.

I am not sure what the RPM speed is for the actual disks are.

This drive can be used with a PlayStation 4 and the Nyko Data Bank. Just make sure you've updated your PS4 firmware past 3.50.

Currently using this drive for rtorrent, and it is actually performing very VERY well.

Seagate's reliability and production standards I feel have greatly improved since their old 7200.11 days. This drive has been working 24/7 for almost 2 weeks now. No hiccups yet, but obviously way too early to make a final conclusion though.

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4 out of 5 eggsClose to perfect, a little loud. Snappy.

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: Not a pro, but this is literally the same size as other drives for storage. Don't believe you can go wrong with it and the price is more than welcome when contrasting comparable products of other brands. The performance itself doesn't feel different than other 7200RPM drives but the cache is always welcome if you're into transferring large files and expect reliability. Once this drive starts going, unlike others, you'll have your files where they're supposed to go in a quick and efficient manner. I dod not suffer any errors nor disconnects as I've read throughout some reviews for other products. All in all, I cannot really distinguish this from another 4TB 7200 rpm drive, but that is because there's a certain threshold when it gets to the point that one of these SSHDs is necessary. I'm glad to recommend but beware of the small noise it emits if you're used to a near-silent environment. I did not use it for video production or editing, but that's what I'd say this is great for; that and storing all those family movies and pictures after they've been backed up to another location.

Cons: Can hear the disk emit a small whine when transferring large files, but this was just done for testing purposes, would most likely not experience this in everyday use.

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5 out of 5 eggsgood product, maybe not as fast as advertised

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: + indeed faster than classic HDD of similar parameters
+ not too expensive
+ good storage capacity
+ nice benchmark results

Cons: - Pretty small NAND cache, only 8GB <- that is the size limit for files being cached, if you frequently operate on huge files (e.g. Photographers processing Camera RAW libraries), you will not see a speed increase
- It’s Seagate (bad experience in general from the past, their drives never lived long for me)
- I am not convinced that nowadays with dropping prices of SSDs the 3.5’’ form factor of SSHD makes any sense anymore. It’s great cheap & fast solution for laptops (2.5'' drives) when user can’t spend the money on large SSD … but for a desktop where you can have multiple drives?

Other Thoughts: Benchmark results from HD Tune 2.55
Transfer rates:
Minimum 44 MB/s
Maximum 184 MB/s
Average 167 MB/s
Access time: 11.2 ms
Burst rate: 136 MB/s

I did saw read speed increase when frequently accessing/reading same groups of files, maybe not up to SSD speeds, but faster than any other files accessed for the first time. Remember however that NAND cache of this drive is limited to 8GB.

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5 out of 5 eggsAwesome combination of performance and size

This review is from: Seagate Desktop SSHD ST4000DX001 4TB 64MB Cache SATA 6.0Gb/s 3.5" Solid State Hybrid Drive Bare Drive

Pros: Much faster than similar non-hybrid drives

Cons: The speed increase is only on files you use repeatedly

Other Thoughts: This hybrid solid state / spinning disk iteration from Seagate is an interesting animal. It claims to wear two hats often worn separately in the typical power user system nowadays, those hats being a smallish solid state drive (SSD) for speed and a gargantuan spinning disk to store data for keepsies. Somehow there’s a voodoo magic built in that will mix the two nicely right? Let’s take a look.

First off with the basics. This drive is a standard sized 3.5” internal SATA connected drive. The drive has four disks internally with two heads a piece and boasts 4 TB of capacity (3.63 TB formatted under Windows 8.1). The SSD portion of the drive or NAND memory is 8 GB.

Seagate claims this drive performs “up to 5x faster than typical desktop hard drives.” So let’s put that to the test. For my tests, the drive was in a new Intel Core i7 based system with an X99 chipset and Samsung 830 SSD as the copy to/from drive. Here’s a couple of file copies as an initial test:

7.9 GB single file: read 198 MB/s, write 198MB/s
27.1 GB folder full of photos: read 143 MB/s, write 143 MB/s

Not exactly what you’d call 5x faster than typical desktop hard drives. So what’s the secret sauce that invokes the drive to use its NAND memory? It turns out the drive learns when it sees repeated use of the same files. So to put that to the test, I performed a read ten separate times with the following results:

5.87 GB folder with 240 photos
Read1: 136 MB/s
Read2-3: 151 MB/s
Read4: 159 MB/s
Read5: 255 MB/s
Read6-10: 326 MB/s

So we do actually see the drive learning and getting faster. I could see how using this drive as the “one drive to rule them all” would work out great as a sole drive in a system. It would also save the user significant money considering the two hats referred to earlier would cost a lot more than this Seagate hybrid drive. As of this writing this drive is priced ($144.99) similarly to many other 4 TB drives which do not have any hybrid capabilities, and even only $25 more than a similar non-hybrid Seagate drive. It’s easily worth my $25 to get significantly improved performance and perhaps skip the expensive, smallish SSD altogether.

Overall a great drive from Seagate, an excellent choice for a budget minded system that still has great performance. A solid 5 egger in my book.

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Item#: N82E16822178379
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