Western Digital Green and Purple 6TB review: Storage anyone?

Western Digital Green and Purple 6TB review: Storage anyone?

Hard drives with a capacity of 2TB or 3TB, a few years ago it seemed a lot, but now we laugh. Seagate recently announced the first 8TB drive and the number of drives with a capacity of 5TB or 6TB also increasing hand over fist. Western Digital sent us the new 6TB versions of their Green and Purple series hard drives we tested.

Our first encounter with a disc of 5TB or more was in April, when we reviewden Seagate Desktop HDD 5TB, a disk which is still is not for sale. In July, Western Digital introduced the Red 6TB focused on NAS devices, which at that time we also felt on the tooth. Later in the year we tested even the dedicated server Seagate Enterprise Capacity 6TB and Toshiba MC04ACA500E 5TB. Of the four tested 5+ TB drives only the first Seagate intended for use in desktop PCs, but rather that turns out not by Seagate to be put up for sale.

The Western Digital Green 6TB is that of course. Traditionally, the disks in the Green series focused on desktop usage, with low power consumption and low noise. The drives are not tuned to put speed records – there one has for the Black series. It makes the Greens drives ideal to place next to an SSD in a PC: a swift SSD for your operating system and programs and a nice large hard drive for any data you do not use often, what more could you want?

Green 6TB is a 3.5 “disk contains five platters each with a capacity of 1.2 TB. This has Western Digital is currently the largest data density of all available hard drives. As usual, Western Digital is not an exact statement of the rotation speed at Green drives, but one speaks IntelliPower. the speed is average down to (about) 5400 rpm. the disc has a Serial ATA 600 interface and uses a 64MB buffer. Due to the fact that hard drive manufacturers see a gigabyte as 1000³ bytes instead of 1024³ bytes, keep your operating system 5450 “real” gigabytes (or more correctly: gibibytes). as with other on Green drives Western Digital provides a 2 year warranty.

The average price is € 248, which the disk converted 4.1 cents per GB cost. That’s slightly more expensive than the Green 3TB and 4TB who sit around 3.6 cents per GB, but still certainly not too much.

Green is not the only new 6TB disk, including the Purple series has now released a Western Digital 6TB model. This Purple drives are aimed at monitoring applications, and are optimized to 24 hours a day, 7 days a week to process video streams at constant speed without hickups. End, WD has the firmware what is called AllFrame technology processes that prevents frames are lost; that works in conjunction with the Serial ATA commands. To use this system, the manufacturer of the equipment should be used in which the disks are naturally support this technique.

The Purple drives also work with IntelliPower and thus do their work at a speed of about 5400 rpm. They also feature TLER (Time Limited Error Recovery), which ensures that a system unnecessarily lingers on an error. Intended for RAID setups, where the RAID technology can handle the error. You could say that the Purple discs are a cross between the former Western Digital AV disks and RAID referred Red discs. RAFF, which should reduce the vibrations of the disks, is missing from the Purple; which makes them less suitable for large RAID setups. The Purple is intended for use in environments up to eight disks. Finally, the Purples are validated extensively with many surveillance system.

The Purple 6TB uses five platters and a 1200GB SATA 600 interface. The price is a little higher: an average of € 285, or 4.7 cents per GB. On the other hand, on this disc 3 year guarantee.

Western Digital 6TB: Test procedure

We test drives under Windows 7 x64 with a test system consisting of an Intel Core i3 3220 CPU and an Intel Z77 chipset motherboard. Obviously enabled in AHCI tests and we have installed the Intel RST drivers.

The bulk of our test procedure consists of performance benchmarks. The HD Tune benchmark shows us include the average throughput and average access time of the drives. Via the Atto benchmark we see how fast his drives to read and wrote small (4KB) and larger (1 MB) data blocks with four simultaneously.

Desktop and laptop writing the most important benchmarks PCMark 7 and PCMark 8. Both are based on the hard disk activity of real applications.

In addition to performance testing, we also measured the power consumption and noise, both idle and in use during a random access test. The noise we measured in a soundproof cabinet at a distance of 10 centimeters.

The graphs comparing the West Digital Green and Purple with other 3.5 “drives 3 TB or more in the graphs you recognize the Green to green bars and the Purple to -. You guessed it – purple bars.

Test results: HD Tune Read

HD Tune we do the standard sequential read and write tests, and an access time test.

The average read speed of both drives is almost identical, a small 130 MB / s. The green has an average access time of 16.2 ms – a fairly normal by applying for desktop drives – the Purple comes at a heavy 19 ms.

Test results: HD Tune Write

Also, if we look at the average write speed we come out around 120 MB / s; Both discs are clearly no stripes tractors. The access time is about 17 ms.

Test results: Atto Random Read

The random read data in small blocks (4 KB) with queue depth 4 equates to 61 MB / s, respectively 83 MB / s and that is basically against.

Test results: Atto Random Write

When writing 4KB data blocks at random locations with four at the same time, we measure approximately 100 MB / s. Also, we have seen even faster.

Test results: PCMark7

The real-world benchmarks PCMark 7 PCMark and 8 are in our opinion the most important, since these tests are based on known traces of genuine software. PCMark7 uses traces based on modern software from the Windows 7 era. A difference with the older PCMark Vantage benchmark that PCMark7 playing the traces in real time. As a result, the scores are much closer to each other, but they do have to translate well to the reality. Twice as high score PCMark7 means that such a task in practice is really twice as fast. The PCMark7 score is determined on the basis of the average of three runs. The latter makes so that the SSHD the second and especially the third run can benefit from caching.

We arrive at a total score of 2170 points for the Green. It must be said; that’s just a fraction less than the Seagate 4TB Desktop HDD Western Digital’s own Caviar Black and V2 4TB. Seagate Desktop HDD 5TB was a lot faster. PCMark 7 for the sake of completeness, we have also rotated on the Purple, but let it be clear that this disc is not intended for use in a desktop.

Western Digital Green and Purple 6TB review: Storage anyone?

Test results: PCMark8

The storage benchmark PCMark8 is again based on traces, but now modern software. PCMark8 contains traces of Adobe Photoshop, Adobe Illustrator, Adobe InDesign, Adobe After Effects, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, World of Warcraft and Battlefield 3. The total score is calculated by taking the geometric mean of the different parts. Again the traces in real time play, so including idle time. The score is an average of three runs.

PCMark8 gives besides the standard score, an average speed of the hard disk activity traces is played. This is so again without idle time.

For Western Digital Green 6TB we arrive at a score of 2875, similar to the Seagate Desktop HDD 5TB. The Purple has a low score, but we must again point out that PCMark test workloads where the Purple discs are not designed for.

Western Digital 6TB: Conclusion

At a time when SSDs hip & happening it is good to know that the developments of hard drives do not stand still. 6 TB is a nice size, with even the most avid collectors of HD movies or RAW photos effort will have to fill it.

The Western Digital Green 6TB clearly tuned at a relatively low power consumption and quiet operation. The disc is certainly no stripes tractor, WD has since the Black series. Looking for a disk to disk as a single place in a system, we would not recommend the WD Green; a Black Edition or rather a SSHD as Seagate in 3.5 “provides a faster choice. A Western Digital Green is a fine choice for next placing an SSD drive for data storage. In a head-to-head with the Seagate Desktop HDD 5TB that would get our latest recommended for higher performance. But as long as the disk is simply not available, the Western Digital Green in the 5+ TB segment the best disk that you can get for the “secondary disk “purpose.

The Western Digital Purple is, as we have also previously tested by Purple discs saw slower than conventional disks. According to WD, this disc however fully optimized in order to continue to process data reliably 100% in a surveillance system. In other words, the consistency of the performance of this disc more important than the performance per se. Unfortunately we do not have good tests to prove these claims from Western Digital. And precisely in this segment is made available each additional TB per drive can be a bonus.

Western Digital Green and Purple 6TB review: Storage anyone? updated: January 20, 2015 author: John Malkovich