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WD Caviar Green 2TB SATA 6Gbps Power Saving Internal Hard Drive OEM

by Western Digital
4.3 out of 5 stars  See all reviews (179 customer reviews)
Price: 76.47 & FREE Delivery in the UK. Details
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Only 7 left in stock.
Sold by UKStocked and Fulfilled by Amazon. Gift-wrap available.
Want it Tuesday, 22 April? Choose Express delivery at checkout. Details
  • Reduced power consumption - WD has reduced power consumption making it possible for energy conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation
  • Cool and quiet - drives that benefit from WD GreenPower Technology yield lower operating temperatures for increased reliability and low acoustics for ultra-quiet PCs and external drives
  • IntelliPower technology - a fine-tuned balance of spin speed, transfer rate, and caching algorithms designed to deliver both significant power savings and solid performance
  • NoTouch ramp load technology - the recording head never touches the disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit
See more product details
There is a newer model of this item:
WD - 2TB Desktop SATA Hard Drive - OEM - Green WD - 2TB Desktop SATA Hard Drive - OEM - Green 4.4 out of 5 stars (95)
In stock but may require up to 2 additional days to deliver

Frequently Bought Together

WD Caviar Green 2TB SATA 6Gbps Power Saving Internal Hard Drive OEM + SUNLUXY 8CH CCTV DVR Day Night Weatherproof Security Camera Surveillance System + Super Deal Genie 4x30M 100FT CCTV Camera DVR Video Power Security Surveillance BNC RCA Connector Cable
Price For All Three: 268.45

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Product Information

Technical Details
BrandWestern Digital
Item Weight490 g
Product Dimensions14.7 x 10.2 x 2.5 cm
Item model numberWD20EARX
Hard Drive Size2 TB
Hard Drive InterfaceSerial ATA
Wattage5 watts
Additional Information
Best Sellers Rank 4,311 in Computers & Accessories (See top 100)
Shipping Weight739 g
Date First Available14 May 2011
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Product Description

Box Contains

Internal HDD

Product Description


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews
65 of 69 people found the following review helpful
5.0 out of 5 stars An updated version of the model 28 April 2012
There are a few different versions of this drive with slightly different geometries (a few more or a few less sectors) and different buffer memory.

This is the OEM version which is usually supplied in an anti-static sleeve and sold in bulk to computer builders. As such, it will not have the normal retail packaging, fixing screws or the information leaflet. You can buy the screws in packs of about 100 quite cheaply or you may be able to beg a few from anyone who builds or repairs computers. Functionally, there is no other difference between OEM and retail versions. The OEM version tends to be slightly less expensive.

As it does not have the normal protection that the retail pack would normally provide and it has been known for some sellers to do rather stupid things when despatching OEM drives. If you should be a victim to one of these sellers, and purchased via Amazon, I would suggest that you return the drive for refund, purchase from a supplier with more understanding of the product and complain to Amazon!

The distinguishing feature of the Caviar Green series is that the motor speed is not constant. In normal use when writing or reading, it will operate at it maximum rotational speed but when inactive, the motor will slow. This will save a proportion of it its normal wattage. It does mean that the drive needs a moment to reach maximum speed from a lower one.
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201 of 220 people found the following review helpful
By Snrub
Verified Purchase
The drive I received is WD20EARX-00AZ6B0 manufactured in Sep 2011.

It is officially the replacement for the WD Green WD20EARS. Having owned several WD20EARS, I expected this drive to be similar or perhaps better. However the drive I received is massively slower than my existing WD20EARS. Average read speed is 84MB/s according to HD Tune, compared to 106MB/s on my WD20EARS. 22MB/s, big difference!

I was also disappointed to note that it has 4x500GB platters. This is old technology, Western Digital introduced 667GB platters in late 2010. Why they would put these old components in a brand new drive with faster interface is baffling.

You should care about this because with 667GB per platter you only need 3 platters for a 2TB drive, hence they have less components and are more reliable. Also higher density platters generally have better sequential performance (assuming the rotational speed is the same). Finally, less spinning mass = less vibration and less power consumption.

*UPDATE 3/12/2012*

This drive has since died. It lasted a little over 1 year.

The warranty replacement service in the UK is very slow. It took over 3 weeks to receive a new hard-drive. The drive I received was a newer 3-platter version WD20EARX-00PASB0
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5 of 5 people found the following review helpful
5.0 out of 5 stars excellent again 15 Sep 2011
By crocal
Verified Purchase
This is the second drive I have bought as the first one works very good, data transfer is fast and since I use a H D D docking station so that it essentially act like an external hard drive.So saying that I would recommend it as an internal drive as well.
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4 of 4 people found the following review helpful
5.0 out of 5 stars Solid performance 14 Jun 2012
Verified Purchase
Purchased over 8 months ago and still performing well. Relatively silent and handles all the work i throw at it. Not using as a boot drive but as storage it works a treat.
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11 of 12 people found the following review helpful
5.0 out of 5 stars Great backup device 23 Sep 2011
Verified Purchase
I have just reviewed a USB 3.0 docking station with USB card reader and my review is in relation of this HDD with that utility. I have had for a couple of years now, an eSATA docking station so that I could use drives without the need for opening the PC case. It was OK but firmware issues meant I had to reboot the PC if I wanted to change the disk, hot swapping wouldn't work.

With the USB 3.0 one, this has changed and opened up horizons for out-of-caddy drives. Enough of the prequel. I already have one of these drives (WD20EAX, so very slightly different). This I use for backup of my home-studio which generates something up to 100GB of data per song (96kHz) where a single instrument in one track easily surpasses 200-300 MB. This data is precious and irreplaceable as you can imagine, so reliability is the word. The studio has the performance scratch disks so what I needed was efficient, dependability. These drives deliver that in abundance. Low power and on the USB 3.0 docker, backups churn away quietly at a respectable 100 MBpS which means I'm not waiting around forever. I have a couple now so take one off-site to ensure that if there is a fire or some other disaster, I have backups to a few days ago secure in another location.

I wouldn't use one of these for a scratch disk for video or audio work but they have a huge thumbs up for storage & retrieval. 10/10 WD.
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16 of 18 people found the following review helpful
1.0 out of 5 stars 100% failure rate! 27 Sep 2012
Verified Purchase
I bought 2 of these drives from Amazon in June 2012 and BOTH had failed by September! I have bought dozens of drives in my time and I have had drives fail before, but not this quickly and not 2 at a time. Looking online I find that I'm not the only one that this has happened to. They were being used purely as storage, my OS is on an SSD. Look elsewhere for your internal HDDs, you have been warned.
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15 of 17 people found the following review helpful
5.0 out of 5 stars Excellent PVR HDD 19 Mar 2012
Verified Purchase
I bought this to update my Sky HD hard drive. It has been in the Sky box for two weeks now, performing flawlessly.

I would recommend this for any PVR use.

Update - 24 Apr 12. As stated above, still performing flawlessly. The drive is very, very quiet in operation.
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Most Recent Customer Reviews
4.0 out of 5 stars Very good
I have two of these fitted to my Synology Diskstation working as mirrored drives in RAID. They can be a little slow to spin up when the Diskstation has gone to sleep but then again... Read more
Published 19 days ago by Graham Q
5.0 out of 5 stars Good and reliable!
I use this in my NAS 24/7 for the past 4 years and it's never failed me.! Very good and quiet
Published 1 month ago by and wan
4.0 out of 5 stars This hard drive is quiet, low power consumption, runs cool and high...
This is an inexpensive internal hard drive, quiet, low power consumption, runs cool, high data capacity, easily a good enough data rate for archived files and music. Read more
Published 2 months ago by Sussman
1.0 out of 5 stars Sonnics company is rubbish
I Left 1 star becuase i bought this HDD from sonnics .
Then they sent me a black one instead of green and also rubbish one with fake western brand and poor quality . Read more
Published 2 months ago by ali
5.0 out of 5 stars great item
Ordered as hard-rives for a network drive. It seems to be functional as expected. What else to say. When it comes to the need I'll come to you again
Published 2 months ago by Mia
4.0 out of 5 stars Works
Does what it is supposed to. Swift transfer. Neither loud nor quiet. Worth the money - I would get one again.
Published 2 months ago by The Atlantean
5.0 out of 5 stars Worked straight out of the box
This unit replaced an old failed drive and has performed fine since then. It may be an old model but it was an exact match for the failed unit.
Published 3 months ago by P. Larrett
5.0 out of 5 stars Excellent Drive
Brought this for my D-Link ShareCenter, very easy to install and still has plenty of space.
Very fast and has had no issues passing content to all the computers on the... Read more
Published 3 months ago by Alex Rhys Davies
5.0 out of 5 stars New build
Great drive, excellent value for money.... I bought this for new build i5 system and would buy again for next build
Published 3 months ago by Mr Chicken
5.0 out of 5 stars Excellent drives
I bought these to install in my Synology DS411j and they have been superb in use. Completely plug and play from the start
Published 3 months ago by Guzzilazz
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