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Western Digital Caviar Green 2.5 TB SATA III Intellipower 64 MB Cache Bare/OEM Desktop Drive - WD25EZRX

4.2 out of 5 stars 525 customer reviews
| 9 answered questions

Available from these sellers.
2.5 TB
  • Ships in Certified Frustration-Free Packaging
  • WD Caviar Green hard drives reduce power consumption by up to 40% and offer best-in-class acoustics and operating temperature and 3rd generation SATA interface.
  • IntelliPower: A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance.
  • 2 year limited warranty.
  • Microsoft operating systems prior to Vista, 32-bit operating systems, and Mac systems prior to OSX 10.4 may not support volumes greater than 2TB. To recognize the full capacity of this drive, you may need multiple partitions. Check with the manufacturer to verify your system's compatibility.
1 new from $299.59 1 used from $130.00 2 refurbished from $150.95
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Technical Details

Size: 2.5 TB
  • Brand Name: WESA9
  • Model Number: WD25EZRX
  • Manufacturer Warranty Description: 2
  • Form Factor: 3.5-Inch
  • Buffer Size: 64 MB
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Product Description

Size: 2.5 TB

Product Description

Available in capacities up to 3TB, WD Caviar Green SATA hard drives reduce power consumption by up to 40% and offer best-in-class acoustics and operating temperature. Based on WD's exclusive GreenPower technology, these drives are designed to deliver power savings as the primary attribute. As hard drive capacities increase, the power required to run those drives increases as well. WD Caviar Green drives make it possible for energy-conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation. They are ideal for PCs, external storage and other devices that require lower power consumption and cool, quiet operation.

From the Manufacturer

WD Caviar Green Hard Drives – Cool, quiet.

The WD Caviar Green desktop SATA hard drives give you the space you need to hold enormous amounts of software, photos and videos. These drives make it possible to build high capacity, cool and quiet systems, while delivering the right balance of system performance and energy conservation.

Why you should choose WD Caviar Green:

WD Caviar Green hard drives provide high capacity storage while using up to 40% less power than traditional 7200 RPM drives. In addition, these hard drives are quieter and cooler than traditional 7200 RPM drives.

Cool and quiet.
WD GreenPower Technology yields lower operating temperatures for increased reliability and low acoustics perfect for ultra-quiet PCs and external drives.
Cool and quiet
Reduced power consumption.
WD's IntelliPower technology delivers both significant power savings and solid performance. Additionally, WD Caviar Green drives consume less current during startup allowing lower peak loads on systems as they are booted.
Reduced power consumption
Massive capacity.
Store up to an amazing 2.5 TB of photos, videos, music and files on a single drive.
Massive capacity
Features at a glance

  • 2.5 TB of storage
  • Reduced power consumption
  • SATA 6 Gb/s interface
  • WD GreenPower Technology
  • 2-year limited warranty
SATA 6Gb/s
WD caviar Green
Ideal for:
  • Adding lots of storage in desktop PCs or external drives and NAS devices
  • Adding extra storage space for photos, videos and music
  • Environmentally-conscious individuals seeking reduced power consumption

SATA 6 Gb/s interface - Twice the interface speed with backwards compatibility to legacy SATA standards.

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.

IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise and vibration.


Advanced Format (AF) - Technology being adopted by WD and other drive manufacturers to continue growing hard drive capacities.

New drives featuring AF are optimized for operation with Windows 7, Windows Vista and Mac OS X Tiger, Leopard, Snow Leopard. For older operating systems such as Windows XP, users must run the free WD Align software utility to achieve the full performance of the drive.

Desktop / Consumer RAID environments - WD Caviar Green Hard Drives are tested and recommended for use in consumer-type RAID applications. (RAID-0 / RAID-1)*

*Business Critical RAID Environments – WD Caviar Green Hard Drives are not recommended for and are not warranted for use in RAID environments utilizing Enterprise HBAs and/or expanders and in multi-bay chassis, as they are not designed for, nor tested in, these specific types of RAID applications. For all Business Critical RAID applications, please consider WD's Enterprise Hard Drives that are specifically designed with RAID-specific, time-limited error recovery (TLER), are tested extensively in 24x7 RAID applications, and include features like enhanced RAFF technology and thermal extended burn-in testing.

Leading the way to green hard drives - WD led the industry in creating a new category of hard drives that use less power and help reduce the world's energy demands one computer user at a time. These drives consume significantly less power than standard drives spinning at 7200 RPM. All WD Caviar Green drives are lead and halogen free, resulting in less pollutants getting into our environment. Beyond the product level, WD's green initiative goes even further focusing on recycling and improving the cleanliness of the air, water and land in the locations surrounding WD facilities.

Upgrading your drive is easy - WD Acronis TrueImage, available as a free download on the WD Support site, enables you to copy all your data to a new drive so you don't have to reinstall your operating system to get all the benefits of a new drive. Note: Bare drive does not include any cables or mounting hardware.

The WD advantage - WD puts our products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. On average, each new product goes through 600,000 hours of testing. WD also has a detailed Knowledge Base with more than 1,000 helpful articles. You can also call toll-free support 7 days per week in the U.S. and Canada. See the WD Support site for full details.

WD Certified

WD-certified packaging - All WD drives purchased from Amazon.com are shipped in WD-certified hard drive packaging. It is designed and fully tested to provide WD products with the highest of safety while in transit. With WD-certified packaging, you can rest assured that your WD hard drive will arrive safely, fully protected, non-descript, easy-open package.

Works with Windows 7/Vista, Mac and Linux operating systems.

You might also consider:

3.5-inch Internal
Comparison Chart
WD Caviar Blue WD Caviar Green WD Caviar Black WD VelociRaptor
Value and reliability
for every day computing.
Cool, quiet.
Maximum performance
for power computing.
The fastest SATA hard drive
on the planet.
Ideal for
Family and business computing.
Desktop PCs, external drives and NAS devices.
Photo and video editing, and
maxed out gaming systems.
Performance enthusiast
systems and workstations.
Capacity range
80 GB – 1 TB
320 GB – 3 TB
500 GB – 2 TB
150 GB – 600 GB
SATA 6 Gb/s
SATA 3 Gb/s
PATA 100 MB/s
SATA 6 Gb/s
SATA 3 Gb/s
SATA 6 Gb/s
SATA 3 Gb/s
SATA 6 Gb/s
Form Factor
8 MB – 32 MB
16 MB – 64 MB
32 MB – 64 MB
32 MB
Limited Warranty
Highest capacity
Highest performance
Photo Video editing

Product Information

Size:2.5 TB
Product Dimensions 9.8 x 9.8 x 5.1 inches
Item Weight 3.3 pounds
Shipping Weight 1.9 pounds
Manufacturer Western Digital
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Item model number WD25EZRX
Customer Reviews
4.2 out of 5 stars 525 customer reviews

4.2 out of 5 stars
Best Sellers Rank #2,328 in Electronics > Computers & Accessories > Data Storage > Internal Hard Drives
Date first available at Amazon.com March 16, 2011

Warranty & Support

Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 2 TB Verified Purchase

Here's a little background on my WD drive experience, to provide context for the review. For my particular usage and review of this specific product, hop further down.

My previous experience with other WD drives have been anywhere between 100 and 500gb drives, typically the WD Caviar Black or Caviar Blue series which are stout (Black being preferred). To date I still use a 250gb Black model which is almost 10 years old and has been in very harsh conditions, ranging from 0*-130* Fahrenheit sustained ambient temperatures, and has been submitted to multiple shocks and shaking around while in use. Needless to say, it's a proven performer and a very solid platform.

Enter the Green drive era.

The WD Green drives boast lower operating temperatures and of being quieter, which they accomplish by on-the-fly adjustment of the RPM of the spindles, which uses less power and produces less heat or noise in the process. Essentially these perform no faster than 5400rpm (some have suggested 5900), rather than 7200rpm, and they will cycle off or go into a low power state at various times.

Some might wonder why such a large drive with "environmental" features, can be so inexpensive compared to the Blue or Black series drives of the same (or less) size. Basically it boils down to reliability. Do your research on the WD Green drives on a lot of tech sites and you'll find that the first generation units had lots of issues because of their "green" features. For example, my experience below

This is my 4th WD Green drive of large capacity, the previous three being 1TB units and first generation. Two of the previous three are also dead, I might add. These 3 previous drives were purchased back in 2010.
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Size: 2 TB
I have 12 or 13 of these drives, bought when the prices were very low just before the Thai floods. If you buy one of these make sure you download and run the WDIDE3.exe from Western Digital to disable the 8 second default for head parking. The wear and tear this causes on the drive mercilessly shortens the life of the drive. Google it and you will find plenty of stories on this. Surprised no class action suit yet for this bad engineering decision. I suspect someone in marketing got their way over the engineers just to make the drives power consumption look better. At least the engineers were good enough to provide an official tool so those in the know (meaning you now you have read this) can fix a very bad design decision.

All modern OS's spin down the drives and it is better to allow BSD, Ubuntu, Windows or what ever else you are using to power down the drives in line with the OS's requirements rather than let the hardware do it, incessantly in this case. It's more than just a theoretical issue. I lost a ZFS RAID when one of four of these drives failed and system logs showed the redundant data had not been written correctly across the drives and pointed to the head parking issue timing it out. I had NO DATA LOSS as I understand a RAID is not back up, so I always have a set of back ups of all my data, however if you are using these drives in a small RAID NAS box in your home please take heed and always have a back up somewhere and do not rely on your NAS being sufficient. Please be paranoid when you deal with your data.

Anyway, my replacement drive for the above RAID was DOA. Another 4 weeks and I got a working one. Applied WDIDE3 to disable the 8 second shut down and have had no issues since.
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Size: 1 TB
Unlike most of the positive reviews, I have owned a few of these drives for around 2 years now. For most of them, they seemed fine during the first few months. So in my mind any review where the drive is less than 3+ months old is not really valid.
I have not had any of the green drives I own survive more than about a year or a year and half at most. Out of the 7 I now own, I have replaced all of them once. And I think I have to replace a replacement now as well.

If you're willing to risk the data you put on these drive getting corrupted, then you can save a few dollars but so far I have yet to have one of the green drives not die before the warranty expired.
If you think "hey it's under warranty, so no big deal" then you're not thinking it all the way through.
Having to replace a drive means losing files or data as well. It's not like replacing a video card or other component. You lose more than just time when a drive fails.
And there was no advanced warning of a failure on any of the drives. I only found out that a drive was starting to fail when I started seeing problems with files getting corrupted and the OS telling me that I had to do a file system check on the drive.

The replacement drives are not new drives. They are all re-certified drives. Which means they were all sent back as damaged and maybe WD fixed something before shipping it back out.

I originally started out with 4 drives at once to put in to a RAID device. I thought that since it was raid 5, it wouldn't hurt if a drive died. Well what happened was 2 drives started corrupting data at about the same time. Which meant the problem was not recoverable. RAID 5 can survive a single drive failure at a time but not 2.
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