Western Digital’s Caviar GP hard drive

Manufacturer Western Digital
Model Caviar GP (1TB)
Price (Street)
Availability Now

Back in the 70s, Kermit the frog lamented that it wasn’t easy being green. My, how times have changed. In this new millennium, being green isn’t only easy, it’s practically expected. Neighbors sneer if you put out more garbage than carefully washed and sorted empties for recycling; grocery stores rake in what I can only assume are huge profits charging five cents per plastic bag; and those who carpool are rewarded with their own special lanes to bypass traffic congestion. Who can blame us, with the inventor of the Internet predicting that melting polar ice caps will one day force us to relive Waterworld.

This push toward environmental friendliness has even permeated the PC industry. Most new components comply with the Restriction of Hazardous Substances (RoHS) directive, for example. The recent trend toward lowering power consumption and improving energy efficiency also lends itself to hugging the planet, even if it was mostly inspired by a desire to reduce the noise generated by Prescott heatsinks.

There’s no ulterior motive behind the latest component to hop on the green bandwagon, though. Western Digital’s new Caviar GP hard drive breaks new ground as the first desktop drive we’ve seen designed explicitly to lower power consumption. Energy efficiency isn’t new in the hard drive world, of course; mobile drives have carefully sipped power to conserve notebook battery life for years. However, the Caviar GP is a 3.5″ drive meant for desktops, and that makes it rather special.

There’s more to the Caviar GP than its Birkenstocks, too. The drive packs a mind-bending 250GB per platter and is available in capacities up to a cool terabyte, making it the biggest drive in the Caviar line. There’s a catch, of course. While most desktop drives spin at either 5,400 or 7,200RPM, the Caviar GP’s spindle speed lies somewhere between the two, and Western Digital won’t say exactly where.

With its spindle speed shrouded in mystery, we couldn’t help but wonder whether the Caviar GP’s performance leans more toward the Tesla Roadster or the Toyota Prius. And what does a slower spindle speed mean for power consumption and noise levels? To find out, we’ve tested the drive against 20 others, with surprising results.

The drive

The fact we don’t know the Caviar GP’s spindle speed is unusual enough, but it only gets more complicated from there. You see, although Western Digital won’t reveal the GreenPower’s exact spindle speed, they did tell us that it varies depending on capacity. The GP is available in capacities of 500GB, 750GB, and 1TB, each of which has a different spindle speed designed to maximize the drive’s overall energy efficiency.

And there’s more.

The GP’s spindle speed falls under an “IntelliPower” umbrella that also includes the drive’s transfer rate and cache size. Western Digital says these three elements are massaged to “deliver significant power savings and solid performance.” Yet spindle speed appears to be the only part of the IntelliPower equation that actually varies depending on drive capacity. GreenPower drives at 500 and 750GB list the same transfer rate and cache size as the 1TB model we’re looking at today.

Differences in spindle speed ensure that Caviar GP performance will depend on capacity. Since we’re testing the terabyte GreenPower, we’ll limit our discussion to that model from here forward.

Caviar SE16


Caviar GP

Maximum external
transfer rate
300MB/s 300MB/s 300MB/s

Maximum buffer to
disk transfer rate
972Mbps NA 1,156Mbps

Sustained buffer
to disk transfer rate
NA 784Mbps NA

Read seek time
8.9ms 8.9ms 8.9ms

Write seek time
10.9ms 9.6ms NA

Average rotational
4.2ms 4.2ms 5.6ms

Spindle speed
7,200RPM 7,200RPM NA

750GB 750GB 1TB

Cache size
16MB 16MB 16MB

Platter size
188GB 188GB 250GB

Idle acoustics
28dBA 28dBA 25dBA

Seek acoustics
29-33dBA 34dBA

Idle power
8.40W 8.5W 4.0W

Read/write power
8.77W 9.5W 9.5W

Native Command
Yes Yes

Perpendicular Perpendicular

Warranty length
Three years (OEM)

One year (Retail)

Five years Three years

Squeezing a terabyte into a 3.5″ hard drive form factor is no easy task, but Western Digital has done it in style using platters that offer a much higher areal density than its other drives. The Caviar GP makes use of perpendicular recording techniques similar to those used by the Caviar SE16 and RE2. Those drives only manage to pack 188GB per platter, though, while the GP shoehorns 250GB onto each disk.

Higher density platters can improve performance by allowing the drive head to access more data over shorter physical distances. This effect is evident when we look at the GP’s maximum buffer-to-disk transfer rate, which is nearly 200Mbps faster than that of the Caviar SE16, despite the drive’s sub-7,200-RPM spindle speed.

Although the Caviar GP spins a little slower than its SE16 and RE2 cousins, the drive’s average read seek time is every bit as fast. Don’t get too excited, though. Western Digital doesn’t publish the GP’s write seek time. WD does list the drive’s rotational latency, and it’s quite a bit slower than the RE2 and SE16.

Average rotational latency refers to half the time it takes for a disk to complete one revolution, and with a little simple arithmetic, it’s easy to convert that to revolutions per minute, or RPM. 5.6 milliseconds of rotational latency works out to about 5,400 RPM, which just happens to be the low end of the GreenPower’s spindle speed range. Western Digital says that’s by design; the latency spec it lists in the GreenPower’s data sheets is merely an estimate based on the spindle speed range of the drive. So much for sleuthing.

We’ve been fussing over spindle speeds so much because they play a major role in determining drive performance. But the Caviar GP isn’t meant to ride the bleeding edge of performance; it’s supposed to be quiet and efficient, and the drive’s specs bear that out. Western Digital rates the GP as quieter than either the Caviar SE16 or RE2 at idle and under load. Power consumption is lower, as well. Even with its terabyte capacity, the GreenPower drive requires just four watts at idle—half that of its 750GB cousins. Curiously, though, the GP’s read/write power consumption is actually a little higher than that of the Caviar SE16.

The Caviar SE16 is, of course, a particularly energy-efficient 7,200-RPM drive. Among its power saving features is a little something called IntelliSeek—a just-in-time actuator delivery scheme that conserves power by allowing the drive to move the head only as fast as is needed to get it into position for the next data point. IntelliSeek can also be found inside the Caviar GP alongside a mechanism called IntelliPark. According to Western Digital, IntelliPark unloads idle drive heads to reduce aerodynamic drag, in turn reducing the amount of energy required to spin the platters. The Caviar GP also features WD’s StableTrac motor, which secures the motor shaft at both ends to reduce vibration. StableTrac is only available on 750GB and 1TB GreenPower models, though.

Warranty coverage is consistent across all three Caviar GP capacities at three years. Naturally, we’d prefer to see the GP inherit the five-year warranty lavished upon enterprise-oriented drives like the RE2. That wouldn’t necessarily make the GP more reliable, but it would entitle you to a replacement drive in the event of a hardware failure for an additional two years. Thus far, only Seagate has stepped up to the plate and offered five years of warranty coverage on its standard desktop drives.

Test notes
We’ll be comparing the performance of the Caviar GP with that of a slew of competitors, including some of the latest and greatest Serial ATA drives from Hitachi, Maxtor, Samsung, Seagate, and Western Digital. These drives differ when it comes to external transfer rates, spindle speeds, cache sizes, platter densities, NCQ support, and capacity, all of which can have an impact on performance. Keep in mind the following differences as we move through our benchmarks:

Max external
transfer rate

Spindle speed

Cache size

Platter size


Native Command

Barracuda 7200.7
150MB/s 7,200RPM 8MB 80GB 160GB Yes

Barracuda 7200.8
150MB/s 7,200RPM 8MB 133GB 400GB Yes

Barracuda 7200.9
300MB/s 7,200RPM 8MB 160GB 160GB Yes

Barracuda 7200.9
300MB/s 7,200RPM 16MB 125GB 500GB Yes

Barracuda 7200.10
300MB/s 7,200RPM 16MB 188GB 750GB Yes

Barracuda ES
300MB/s 7,200RPM 16MB 188GB 750GB Yes

Caviar GP





Caviar SE16
300MB/s 7,200RPM 16MB 83GB 250GB No

Caviar SE16 (500GB)
300MB/s 7,200RPM 16MB 125GB 500GB Yes

Caviar SE16 (750GB)
300MB/s 7,200RPM 16MB 188GB 750GB Yes

Caviar RE2
150MB/s 7,200RPM 16MB 100GB 400GB Yes

Caviar RE2 (500GB)
300MB/s 7,200RPM 16MB 125GB 500GB Yes

Deskstar 7K500
300MB/s 7,200RPM 16MB 100GB 500GB Yes

Deskstar 7K1000
300MB/s 7,200RPM 32MB 200GB 1TB Yes

DiamondMax 10
150MB/s 7,200RPM 16MB 100GB 300GB Yes

DiamondMax 11
300MB/s 7,200RPM 16MB 125GB 500GB Yes

Raptor WD740GD
150MB/s 10,000RPM 8MB 37GB 74GB No*

Raptor X
150MB/s 10,000RPM 16MB 75GB 150GB Yes

Raptor WD1500ADFD
150MB/s 10,000RPM 16MB 75GB 150GB Yes









SpinPoint T
300MB/s 7,200RPM 16MB 133GB 400GB Yes

Note that the 250GB Caviar SE16 and the Raptor WD740GD lack support for Native Command Queuing. The WD740GD does support a form of command queuing known as Tagged Command Queuing (TCQ), but host controller and chipset support for TCQ is pretty thin. Our Intel 955X-based test platform doesn’t support TCQ.

We have test results from several versions of Western Digital’s Caviar SE16 and RE2. To avoid confusion, we’ll be listing their capacities in parentheses in each of our graphs.

Since Seagate makes versions of the 7200.7 both with and without NCQ support, the 7200.7 in our tests appears as the “Barracuda 7200.7 NCQ” to clarify that it’s the NCQ version of the drive. The other drives aren’t explicitly labeled as NCQ drives because they’re not available without NCQ support.

Finally, we should note that our WD1500ADFD has a slightly newer firmware revision than the Raptor X sample we’ve had since February, 2006. The drives still share identical internals, but firmware optimizations could give our newer Raptor an edge over the X in some tests.

Performance data from such a daunting collection of drives can make our graphs a little hard to read, so I’ve highlighted the Caviar GP 1TB in bright yellow and its high-capacity competitors—the Barracuda 7200.10 and ES, the Deskstar 7K1000, and the Caviar SE16 and RE2 750GB—in pale yellow to set them apart from the others. We also have two sets of IOMeter graphs: one with all the drives, and another with just the Caviar GP and its direct rivals. Most of our analysis will be limited to how the GP compares with its direct rivals, so it should be easy to follow along.

Our testing methods
All tests were run three times, and their results were averaged, using the following test system.

Processor Pentium 4 Extreme Edition 3.4GHz
System bus 800MHz (200MHz quad-pumped)
Motherboard Asus P5WD2 Premium
Bios revision 0422
North bridge Intel 955X MCH
South bridge Intel ICH7R
Chipset drivers Chipset
Memory size 1GB (2 DIMMs)
Memory type Micron DDR2 SDRAM at 533MHz
CAS latency (CL) 3
RAS to CAS delay (tRCD) 3
RAS precharge (tRP) 3
Cycle time (tRAS) 8
Audio codec ALC882D
Graphics Radeon X700 Pro 256MB with CATALYST 5.7 drivers
Hard drives Hitachi 7K500 500GB SATA
Western Digital Caviar SE16 750GB SATA
Maxtor DiamondMax 10 300GB SATA
Seagate Barracuda 7200.7 NCQ 160GB SATA
Seagate Barracuda 7200.8 400GB SATA
Seagate Barracuda 7200.9 160GB SATA
Seagate Barracuda 7200.9 500GB SATA
Seagate Barracuda 7200.10 750GB SATA
Western Digital Caviar SE16 250GB SATA
Western Digital Caviar RE2 400GB SATA
Western Digital Raptor WD740GD 74GB SATA
Western Digital Raptor X 150GB SATA
Western Digital Raptor WD1500ADFD 150GB SATA
Western Digital Caviar RE2 500GB SATA
Western Digital Caviar SE16 500GB SATA
Seagate Barracuda ES 750GB SATA
Samsung SpinPoint T 400GB SATA
Maxtor DiamondMax 11 500GB SATA
Hitachi Deskstar 7K1000 1TB SATA
Western Digital RE2 750GB SATA
Western Digital Caviar GP 1TB SATA
OS Windows XP Professional
OS updates Service Pack 2

Thanks to the folks at Newegg for hooking us up with the DiamondMax 11 we used for testing. Also, thanks to NCIX for getting us the Deskstar 7K1000.

Our test system was powered by OCZ PowerStream power supply units. The PowerStream was one of our Editor’s Choice winners in our last PSU round-up.

We used the following versions of our test applications:

The test systems’ Windows desktop was set at 1280×1024 in 32-bit color at an 85Hz screen refresh rate. Vertical refresh sync (vsync) was disabled for all tests.

All the tests and methods we employed are publicly available and reproducible. If you have questions about our methods, hit our forums to talk with us about them.

WorldBench overall performance
WorldBench uses scripting to step through a series of tasks in common Windows applications. It then produces an overall score. WorldBench also spits out individual results for its component application tests, allowing us to compare performance in each. We’ll look at the overall score, and then we’ll show individual application results.

Green power gets off to an encouraging start in WorldBench, where it matches the performance of Hitachi’s terabyte Deskstar. The Caviar GP is only one point off the lead here.

Multimedia editing and encoding

MusicMatch Jukebox

Windows Media Encoder

Adobe Premiere

VideoWave Movie Creator

Among WorldBench’s multimedia encoding and editing tests, only Premiere seems to push our hard drives. There, the GP and Deskstar are neck and neck again, just a little off the pace set by Western Digital’s latest Caviar SE16 and RE2.

Image processing

Adobe Photoshop

ACDSee PowerPack

ACDSee benefits more from faster drives than Photoshop, and the GP again finds itself trailing the SE16 and RE2. The GreenPower drive can’t seem to shake Hitachi’s terabyte Deskstar, either.

Multitasking and office applications

Microsoft Office


Mozilla and Windows Media Encoder

None of the drives distinguish themselves through WorldBench’s office and multitasking tests.

Other applications



WinZip and Nero are a little different. In both, the Caviar GP continues its trend of nearly matching the performance of the Deskstar 7K1000. The fastest half of the field is all pretty close in WinZip, though. In Nero, the drives are a little more spread out, with the GP pulling up nearly 50 seconds slower than Western Digital’s fastest 7,200-RPM drive.

Boot and load times
To test system boot and game level load times, we busted out our trusty stopwatch.

Quick boot times are not a strong suit of the Caviar GP. The GreenPower finds itself at the back of the class here, saved from complete humiliation by the Deskstar 7K1000. It’s interesting to note that the terabyte drives turn in the slowest boot times, though.

The GP bounces back in our game load time tests, where it moves up the field a little. However, the Deskstar has a couple of seconds on the Caviar in each test.

File Copy Test
File Copy Test is a pseudo-real-world benchmark that times how long it takes to create, read, and copy files in various test patterns. File copying is tested twice: once with the source and target on the same partition, and once with the target on a separate partition. Scores are presented in MB/s.

To make things easier to read, we’ve busted out our FC-Test results into individual graphs for each test pattern. We’ll tackle file creation performance first.

In this first wave of file creation tests, the GreenPower finds itself trailing the Caviar SE16 and RE2 by hefty margins. The GP does manage to beat the terabyte Deskstar in three of five test patterns, and it’s consistently way ahead of the Barracuda 7200.10 and ES.

Read performance is more mixed for the GP. With the ISO test pattern, which features a small number of large files, the drive falls way behind its rivals and into last place among high-capacity drives. The other test patterns prove more fertile ground for green power, allowing the GP to move ahead of its Barracuda competition. That isn’t enough to catch the Deskstar, though, let alone the Caviar SE16 and RE2.

FC-Test – continued
Next, File Copy Test combines read and write tasks with some, er, copy tests.

The ISO test pattern proves problematic again for the Caviar GP, this time in FC-Test’s copy tests. In fact, the GreenPower drive doesn’t fare that well at all here. It’s slower than the Deskstar 7K1000 in four of five test patterns, and only barely faster in the fifth.

FC-Test’s second wave of copy tests involves copying files from one partition to another on the same drive.

FC-Test’s ISO test pattern proves more manageable for the GreenPower here, but the drive still lags way behind its SE16 and RE2 cousins. At least the GreenPower is able to stay ahead of the Deskstar in most of the test patterns. However, it’s beaten just as often by Barracuda drives that are more than a year and a half old.

iPEAK multitasking
We’ve developed a series of disk-intensive multitasking tests to highlight the impact of command queuing on hard drive performance. You can get the low-down on these iPEAK-based tests here. The mean service time of each drive is reported in milliseconds, with lower values representing better performance.

The GP gets off to a rough start in iPEAK, falling behind its direct competition in our dual file copy workload and well off the pace set by the 7K1000. iPEAK workloads that involve compressed file creation are a little quicker on the Caviar GP, allowing the drive to nudge ahead of the Barracudas. Green power finally hits its stride with workloads that involve compressed file creation, where the GP edges out the terabyte Deskstar. It still can’t catch the latest Caviar SE16 and RE2, though.

iPEAK multitasking – con’t

Our second wave of iPEAK workloads present new challenges to the GreenPower, and we see different trends emerge. Here, the GP performs best with workloads that include a VirtualDub import as a secondary task. Under those loads it’s faster than the Barracudas, but can’t quite catch its other direct rivals. However, the tables turn when that secondary task becomes a file copy operation, plunging the GreenPower into last place among high-capacity drives.

IOMeter – Transaction rate
IOMeter presents a good test case for command queuing. To keep things easy to read, we’ve busted out two sets of graphs here. The first includes the Caviar GP and its closest competitors, while the second has results for all the drives we’ve tested. With over 20 drives, those latter graphs are a little difficult to read, so we’ll focus our attention on the first set and the Deskstar’s direct rivals.

The slower spindle speed doesn’t seem to slow the Caviar GP under IOMeter’s demanding multi-user loads. The drive is consistently faster than its Deskstar and Barracuda adversaries, and its performance scales more aggressively as the number of outstanding I/Os increases. Under heavier loads, the GP is actually faster than the Caviar SE16. In fact, it’s even quicker than the enterprise-oriented RE2 with 128 and 256 concurrent I/O requests.

Good luck with these, folks.

IOMeter – Response time

IOMeter response times look very good for the Caviar GP, making me wonder if Western Digital has an enterprise-oriented version of the drive in the works.

IOMeter – CPU utilization

CPU utilization is low across the board.

HD Tach
We tested HD Tach with the benchmark’s full variable zone size setting.

HD Tach’s synthetic transfer rate tests easily expose the Caviar GP’s greatest weakness: performance with sequential transfers. Even the Barracudas come out well ahead of the GreenPower here, with the Deskstar a good 10MB/s in front.

At least the GP’s burst performance is decent. This is more a measure of disk cache transfer rate, and it looks like Western Digital’s using a similar cache on its latest Caviar and RE2 drives.

Seek performance doesn’t look particularly good on the GreenPower. Despite Western Digital’s claim that the GP offers the same read seek time as its SE16 and RE2, HD Tach’s random access time test clocks the drive at more than a millisecond slower. The Deskstar 7K1000 has just over a two-millisecond advantage here.

CPU utilization results are within HD Tach’s +/- 2% margin of error in this test.

Noise levels
Noise levels were measured with an Extech 407727 Digital Sound Level meter 1″ from the side of the drives at idle and under an HD Tach seek load. Drives were run with the PCB facing up.

Thus far, we’ve seen the Caviar GP’s performance suffer due to the drive’s slower spindle speed, but here’s where it all starts to make sense. The GreenPower is the quietest desktop drive we’ve ever tested, by close to a decibel and a half at idle. When seeking, the GP is more than two decibels quieter than the next closest high-capacity drive. What’s more, it’s a whopping six decibels quieter than a Deskstar with equivalent capacity.

Power consumption
For our power consumption tests, we measured the voltage drop across a 0.1-ohm resistor placed in line with the 5V and 12V lines connected to each drive. Through the magic of Ohm’s Law, we were able to calculate the power draw from each voltage rail and add them together for the total power draw of the drive.

The Caviar GP delivers on its energy efficiency promise, too. Even with a terabyte spread over four platters, the drive consumes less power than a single-platter, 160GB Barracuda 7200.9. At idle, you save about three watts over a Deskstar 7K1000. Under a seek load, that advantage grows closer to eight watts, with the Caviar GP pulling half the power of the 7K1000.


Kermit was right: it ain’t easy being green, er, power. Dialing back the Caviar GP’s spindle speed predictably slows the drive, making the GreenPower a poor choice if you’re looking for fast sequential transfer rates, quick load times, or great performance with disk-intensive multitasking loads.

Fortunately, there’s more to the performance picture for the Caviar GP. Western Digital was only aiming for “solid” performance with the drive, and they’ve largely achieved it. The GreenPower performed well in WorldBench, for example, so it’s a perfectly acceptable drive for mainstream desktop applications. Performance in IOMeter was surprisingly good, too, making it tempting to recommend the GP for power-efficient enterprise storage. Sure, it’s not optimized for RAID environments like Western Digital’s enterprise-class products, but the power savings will add up in multi-drive environments.

Lower power consumption was Western Digital’s primary goal with the GreenPower, and they’ve nailed it. The Caviar GP is the most power-efficient drive we’ve ever tested, and that’s saying a lot considering its terabyte capacity. No other high-capacity drive even comes close, and Hitachi’s terabyte Deskstar sucks twice the power of the GP under load.

We expected the GreenPower to be energy-efficient. What we didn’t expect was the drive’s incredibly low noise levels. The GreenPower makes less noise than any other 3.5″ drive we’ve tested, particularly at idle, where it’s barely audible. That makes this drive perfect for home theater PCs, where its terabyte capacity is ripe for HD recording, and also for silent desktops where noise levels take precedence over performance.

The icing on the cake for the Caviar GP is the fact that the drive is actually quite affordable. With street prices as low as $288 online, the GreenPower is 10% cheaper than its nearest terabyte rival. That sounds just about right given the drive’s performance, making it easy to recommend the Caviar GP to anyone looking to lower his PC’s noise levels or power consumption.

Comments closed
    • End User
    • 12 years ago

    Great review.

    I just popped one of these into an external case – perfect timing for use as a Time Machine drive for my main rig (G5).

    I was attracted to the GP due to its low noise/power/heat and great price.

    I went with the WD’s SE16 750 for my gaming rigs boot drive but I would definitely consider getting more GP’s for use as storage drives (especially in my NAS).

    • grenadier
    • 12 years ago

    I think one big bonus of this drive that everyone seems to be missing here is heat. Unfortunately the review doesn’t do any drive temperature readings, but a few other reviews floating around the web have.

    Hard drives in general throw off a hell of a lot of heat (movement = friction = heat) into your case and the Deskstar 1TB is one of the hottest drives around. If you want a quiet drive for a htpc the GP is a perfect match, but it also might be a good fit if you’re looking to lower your cpu/gpu temps for that little extra bit of OC headroom – especially if you’re using more than one drive in your system. In the tom’s hardware review after two hours of intensive operation the GP runs a full 12 degrees cooler than the hitachi (41 vs. 53) putting it into the same league as single platter designs. Any way you slice it that’s a lot less heat spilling into your case.

    Just thought I’d throw in my 2 cents.

      • Usacomp2k3
      • 12 years ago
      • paulcooperorama
      • 12 years ago

      I was thinking the same thing about heat… I have read that these drive do not create as much heat (probably due to the slower spindle speed) my concern is putting these drives in a raid. they seem ok stand alone. what is the MTF (mean time to failure) but what is the effect on controllers as well. these higher capacity drives are being used more in larger raids what is the effect on larger storage units as well as the external usb controllers?

    • FireGryphon
    • 12 years ago

    You must have had fun generating those IOMeter graphs. 😉

    Awesome review, as always. I’ll probably look for a hdd like this for my next build.

    • swaaye
    • 12 years ago

    Heh. Hard drive power consumption isn’t exactly out of control. I guess they needed a new way to market them. I sense a new bandwagon coming to town.

    • UberGerbil
    • 12 years ago

    I would be interested in seeing power consumption at spin-up for this (and all other drive reviews). While it represents a very small chunk of overall power usage, it can represent /[

    • Lostfaith
    • 12 years ago

    I would also appreciate it if there could be a small graph of the monthly added / difference in cost to a particular (let’s say 25ct /kWh) electrical bill by adding a “Green drive” or heck, even a green PSU to your pc.

    I’m amazed that there’s so little focus yet on this by all review sites.
    Nice to hear about green stuff, 80+, power efficient, but what real life difference? well us readers still have to just whip out a calculator to see if it’ll make a dollar or two difference.

      • UberGerbil
      • 12 years ago

      (#1) 25ct/KWH is /[

        • indeego
        • 12 years ago

        I see his point. It wouldn’t hurt to use the average residential energy costs in the U.S. as an example:
        §[<http://www.eia.doe.gov/cneaf/electricity/epm/table5_6_a.html<]§ After all, many of us could figure it out, but we don't want to. We could also benchmark all these drives ourselves, (at great expense) but we don't want tog{<.<}g

          • eitje
          • 12 years ago

          well, the difference in cost between pulling out your last electric bill and doing all of the benchmarking yourself is pretty drastic.

    • flip-mode
    • 12 years ago

    #9, #17, power efficiency is desirable in every component of the computer. A couple weeks ago TR did the power supply review and one of the big “features” of the power supplies was their efficiency. Couple that with CPU efficiency, HDD efficiency, chipset efficiency, and *cough* GPU efficiency, if you only save a few watts from each component then you aggregate some decent gains. Power efficiency is a worthwhile pursuit in each and every component of the computer.

    • Sargent Duck
    • 12 years ago

    On your conclusion page /[

    • Krogoth
    • 12 years ago

    “Green” labeing on this HDD is nothing, but a marketing gimmick. HDDs aren’t really that large of a power hog, unless you got 10K and 15K units running. The point where HDD consume the most juice is upon start-up where the electronic motor has to rev-up. I doubt this “Green” WD 1TB HDD fares much better than normal 7200RPM counterparts.

    I find it funny to called a “1TB Green”. It is like a making a hybird SUV and calling it “Green” when it only get like 1MPG more than its normal counterpart.

    If HDD wanted to seriously make a “Green” HDD. Just make a 5400RPM unit with a single high-density platter. Sure its performance wouldn’t be stellar, but no 7200RPM could touch it in power consumption arena.

      • [+Duracell-]
      • 12 years ago

      This would be a great drive if you have a file server or something with a RAID array or something. Or even just an additional drive for storage.

    • SuperSpy
    • 12 years ago
    • snowdog
    • 12 years ago

    I don’t get all the complaints in the comment section. It is not like it is the slowest drive in the world. It is still fast for the home user. On top of being quieter, drawing less power and producing less heat. It may even be more reliable by keeping it cool running and slower spindle speeds.

    It seems like a great drive to me.

    • raymin
    • 12 years ago

    An OK review but about 2 weeks behind StorageReview.com’s much better comparative article. Their use of a stable test bed means you can compare the Caviar GP’s numbers to the Caviar RE from 2 years ago.

    Also, TR and other sites need to steer away from using IOMeter to benchmark desktop/workstation drives. No desktop system – even those of this enthusiast crowd – can come close to the highly randomized, IO-intensive usage scenarios of even a workgroup server.

    BTW, StorageReview was able to calculate the drive’s rotational speed and estimate it’s actually around the 5400rpm mark.

      • Dissonance
      • 12 years ago

      Actually, our hard drive test rig has been stable for a while, which is why you’ll find results from Barracuda 7200.7 NCQ in the mix. That drive is over two and half years old.

      Also, we use IOMeter because we subject all hard drives to a mix of desktop, workstation, and server loads. We see no reason to limit our testing of desktop drives to desktop apps, or enterprise drives to enterprise apps. Enthusiasts have been using enterprise-class drives in desktop systems for years, and desktop products like the GP are certainly suitable for some enterprise environments.

        • flip-mode
        • 12 years ago


        • raymin
        • 12 years ago

        #20 Dissonance, thanks for responding.

        “Enthusiasts have been using enterprise-class drives in desktop systems for years…”
        This is precisely the problem. When you keep benchmarking server-specific workload scenarios, it furthers the perception that “I’m not a typical user so I need a drive that can handle heavy IO for multitasking”. StorageReview has long shown that such thinking does not translate. For instance, Western Digital’s Raptor actually beats most 15K SCSI/SAS drives in workstation usage scenarios, but trails them significantly in real server workloads.

        “…desktop products like the GP are certainly suitable for some enterprise environments.”
        No, they’re not! If you even read the Google Study you’d recall that the failure rate for desktop hard drives (SATA & PATA) used in enterprise-class environments is several times that of enterprise-targetted drives. Furthermore, even in SANs (where the Caviar GP might seem a logical choice), the usage pattern (heavy randomanized read operations) is such that the more mature Queuing algorithms, more powerful IO processors, RAID-focussed desing, and better engineering for noise, vibration, and temperature tolerance of enterprise drives.

        Nonetheless, your review was good overall. *[

          • flip-mode
          • 12 years ago

          Please note Diss didn’t say “all Enterprise environments”, but *some* Enterprise environments. That distinction does make some difference. We could do a file server here at my office with these drives.

          • Damage
          • 12 years ago

          raymin, I’ll field this one. You say:

          l[https://techreport.com/discussions.x/11890<]§ Also, your mention of things like "more mature queuing algorithms" suggest you're unaware that many drive makers offer enterprise-class variants of their desktop products based on nearly identical (or entirely identical) hardware with different firmware. I would dispute the notion that such products are materially different or that their caching algorithms are more mature (rather than simply tuned differently) than their desktop variants. More importantly, we have little info at present about the Caviar GP's likely reliability. We can surmise that its lower spindle speed and lower power/heat are likely to make it a very reliable drive, relatively speaking. I don't think Geoff's assessment that this low-power, high-storage-density drive might be right for some enterprise environments ought to be in any way controversial. Then again, Geoff did speculate about the possibility that a variant of this drive may be coming that's more directly targeted to the enterprise. If so, this is an intriguing technology preview of a possible future enterprise-class product. I also fail to see how Geoff's conclusion failed to address WD's goal of "massive, quiet, cool, reliable storage," as you put it. (Thanks for noting the reliability thing, though.) And if you love Storage Review so much, why don't you marry it? :)

            • eitje
            • 12 years ago

            he proposed, but – after a thorough review – they determined he wasn’t suited for their environment.

            • jobodaho
            • 12 years ago


            • dmjifn
            • 12 years ago

            Wow. I think it is great that someone can bring criticism, have it thoroughly addressed, and leave the environment one that’s still open for people to challenge things.

            Seriously, I’m glad that John Gabriel’s Greater Internet F*ckwad Theory stayed out of this.

      • indeego
      • 12 years ago

      I had several gripes about StorageReview before I stopped visiting:

      1. The reliability survey is based on a quite flawed statistics model, thereby making it useless to even bother with including on a site that prides itself on accuracy in benchmarking and presenting the best data on HDD’s. On a very basic level you can’t infer *[

    • mako
    • 12 years ago

    My current system could use a quieter hard drive (not to mention more space). 500GB using only two platters sounds good. I’ll probably be getting one of these.

    • Usacomp2k3
    • 12 years ago

    I wonder about the temperature differential too. If it’s consuming a good bit less power, then there’s reason to believe that it’s producing less heat. That is always a good thing, especially when it comes to dense arrays of hdd’s. I wonder if it’d be possible to TDP of a hard drive. It’s probably fairly linearly with the power consumption. Since you have to power the drive and often pay for the cooling of heat produced, you can almost factor a savings of double for unit less of power used.

    • Klopsik206
    • 12 years ago

    I do not understand focusing on power efficiency of HD which pull < 10W of juice in worst case anyway. It’s irrelevant next to power hungry GPUs, CPUs, and chipsets lately.

    Even if you run RAID array it’s not great save (comparing to performance hit).

    I agree with indeego, It’s only real strength is low noise level…

    • Usacomp2k3
    • 12 years ago

    I could see these as being helpful in a datacenter environment where all-out speed isn’t important, but having 100 is amazing. Just a little bit of my own dabbling:

      • Klopsik206
      • 12 years ago

      Yup – this is probably targeted to datacenters. On the desktop it’s not much a save.

    • willyolio
    • 12 years ago

    wow. this review has just put the hard drive at the top of my list of hard drives for my next build.

    i was expecting the low-power, mystery-speed hard drive to take a bigger hit in performance, but it looks like it won’t even be noticeable.

    • chasscF1
    • 12 years ago

    I really like the idea and execution of this product. I’d love to put one in my next build. There’s no reason to not be able to get good performance and low power consumption. I’m glad WD took this step.

    • PRIME1
    • 12 years ago

    Seems to be one of the least expensive TB drives on Newegg.

    Although If you are trying to slim down power (and willing to sacrifice performance) I doubt you are looking for this kind of space.

    Either way it’s a fairly nice drive that is addressing the power issue.

    Something that hopefully will be looked at by all companies soon.

      • Voldenuit
      • 12 years ago

      It’s still lightyears ahead of most 2.5in htpc candidates in terms of performance and capacity, not to mention price per gigabyte.

      And space? Storing (and collecting) media chews through more space than most other pc uses.

    • Voldenuit
    • 12 years ago


    Performance is ‘solid’, and that’s more than good enough for a htpc box. Seeing as these are often slim/SFF cases, the lower power consumption, and by extension, lower heat output, ought to pay off as well.

    • indeego
    • 12 years ago

    Seems only worth it if your goal is quietness first. Strange that it’s recommended then.

    The power savings are minimal compared to other areas where you could save a lot more, say using a low watt CPU/GPU/motherboardg{<.<}g

      • Saribro
      • 12 years ago

      5W less idle power for a hard drive comes down to a 10% system idle power reduction for me, that’s hardly minimal, especially considering the performance and capacity bonus over the usual 2.5″ option for lower power. A few watts here, a few more there, another dozen somewhere else and all of a sudden you’ve halved idle consumption.
      Then again, why bother caring about PC consumption when you’re just leaving the lights on all day anyway. Just because you can do bigger things, doesn’t mean you have to ignore the smaller ones.

        • indeego
        • 12 years ago

        Because I tend to focus my efforts at conservation in areas that make a much larger difference, and that don’t sacrifice in the functionality. Take a CFL, it can easily save you 75-80% electricity, and I see no downside to using them over incandescent lamps now that they have the spectrum down pat. This drive, on the other hand, is a compromise in some ways I’m not comfortable with yet: performance degradation. Want a fairly fast silent PC? go for this. But let’s not pretend that this is the future of HDD’s. I feel the same way about maxtor drives with 1 year warranty. If a drive can’t maintain a status symbol as being reliable, then why bother with it?

        How about adding one more drive to the mix? A 5400 RPM drive, and see how much power it drawsg{

    • ssidbroadcast
    • 12 years ago

    Well, at roughly 28¢ a GB, I guess it’s more economical than the T1 Deskstar…

    … these hard drive articles make me yawn really hard.

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