Product Features
- WD Caviar Green hard drives reduce power consumption by up to 40%
- A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings
- IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration.
- 2TB capacity holds up to 400,000 digital photos, 500,000 MP3 files, and 240 hours of HD video.
- Ships in Certified Frustration-Free Packaging
Technical Details
- Brand Name: Western Digital
- Model: WD20EARS
- Hardware Platform: PC, Mac
- Form Factor: 3.5" x 1/3H
- Hard Disk Size: 2 TB
- Hard Disk Description: Internal hard drive
- Warranty: 3 years warranty
- Hard Disk Interface: Serial ATA-300
- Hard Disk Rotational Speed: 5400.0 RPM
- Buffer Size: 64 MB
- Width: 4 inches
- Depth: 5.8 inches
- Height: 1 inches
- Weight: 1.6 pounds
Product Description
Size: 2 TB
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.
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.
Massive capacity.
Store up to 2 TB of photos, videos, music and files on a single drive.
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
Features:
SATA 3 Gb/s interface - The industry standard and most common interface.
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 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, in an , non-descript, easy-open package.
Compatibility
Works with Windows 7/Vista/XP/2000, Mac and Linux operating systems.
Product Description
WD Advanced Format technology increases media format efficiency, thus enabling larger drive capacities. WD Advanced Format drives are specifically optimized for Mac and the latest Windows operating systems such as Windows Vista and Windows 7. WD Advanced Format drives work with legacy operating systems such as Windows XP but require the use of the free WD Align software available on www.wdc.com/advformat.Available in capacities up to 2 TB, 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.
Customer Reviews
By EEhead
I have bought a LOT of the 2TB WD Caviar drives. I have had excellent results with them on my iMac. I use them primarily for data storage where fast data retrieval is not a consideration. I'm more concerned with plugging them into these USB-based drive docks when I need the data. However, I'm also interested in them from an electrical perspective, just because ... well, just because I'm interested in them. Over the years I have worked my way up the ladder of hard drive storage capacities. Like many of you, I've been rather appalled at how hot these older models would get. I swear, you could fry an egg on some of them. I never felt comfortable with their longevity, fearing that they would most likely burn themselves up. Fortunately, none did.
When the Caviar Green product line came out (1TB was when I first took notice), I was quite intrigued at the claimed power reduction. In electronics, heat is the main enemy of components. Usually every 10 degree C rise in temperature translates into a halving of component life. The Caviar brand looked like a way to get a much more reliable drive if the power reduction numbers actually panned out.
I took one of the drives in to work where I have fancy test gear at my disposal. In particular, I have some very good Tektronix current probes that let me measure DC and AC currents. I built a little cable that let me get to the +12V and +5V lines so that I could clamp my current probes around the wires to measure current consumption. I connected the two power leads to power supplies so that I could also vary the two voltages. In this fashion, I can accurately see and measure power consumption of the drive as I exercise the drive. I get far more accurate measurements this way than you can with a simple watt-meter, which seldom let you see fractional watts.
Since I can't (actually, don't know how to) embed scope photos in this review, all I can do is verbally describe my observations. My tests are far from extensive, but they will give you a good idea of how much power these drives draw, and when they draw it.
* When the drive is just sitting there, doing nothing but spinning, the +12V current drain is 0.24A and the +5V drain is 0.13A. That totals 4.2 watts of power during idle. I have not measured earlier, high-power drives, but I'm willing to bet the Caviar Greens draw at most half the power of traditional hard drives. I would not be surprised if it were 1/3 the power.
* If you shut off one voltage, the other supply stops drawing all power. It's a convenient way to power the drives on and off. I would suggest power cycling the +5V rail as the circuitry to shut off the +5V supply with a simple PFET is simpler than that for the +12V rail.
* When the drives are first powered up, +5V draws an almost constant 500-600 mA. +12V current is a ramp, starting at 200 mA and works its way up to 600 mA after about 10 seconds, when the drive is then up to speed. At this point, the +12V peak current drops down to idle spinning) current of 0.24A. It does not vary much after this, regardless of disk activity (erase, write, read, etc.). On the other hand, the +5V supply current gets busy. It's pretty clear that the head servo is driven from the +5V supply and not the +12V supply. It's hard to verbally describe the +5V current, but I would say the average current during head movement activity is about 400 mA. When there is no activity, the +5V current is about 0.13A. When the drive is done doing what it is doing, then it drops into the 4.2W idle power mode that I mentioned above. If you are a power supply designer, you should be aware that these DC currents I cite are averages, and that you have a "hash" of AC currents that result in the average values I list. The +5V current has a hash of about 300mA p-p, and the +12V current hash is maybe 400mA p-p.
* I have never succeeded in getting OSX to put the drives to sleep. I've tried all the utilities in the Mac universe (SpinDown, Cocktail), but no matter what you do, the drives never want to got to sleep, at least for me. If WD puts out a utility for the PC, they certainly offer no support for OSX. Even if you properly eject the drives from the desktop, they sit there spinning and drawing 4.2W. Hardly seems "fully green" to me.
* During the idle mode, my infrared thermometer measures a case temperature rise of 12 degrees C, which is a pretty low number. UL safety limits for human hand touch temperatures are usually between 50-55 degree C -- you'll begin to pull your hand back at that temperature range. So if the drive is 12 degrees above ambient, and you are sitting at normal room temperatures (25 degrees), then your drive temperature is only about 37 degrees (98.6 degrees F, just like a human!). This explains why people are reporting that the drive "feels pretty cool." As these things go, they do indeed run quite cool.
Here's hoping that some of you more technically-inclined customers out there find this data useful.
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