HD Tune:
HD Tune tests many features of a drive. With each new version they keep adding more bells and whistles that make it that much better of a product. Below we see the info page, which displays the drive’s features, and the AAM page, which shows the average access time.
Continuing on, we see how the Western Digital Caviar Green 3TB drive handles HD Tune’s read test.
| Onboard | Rocket 620 |
Again we notice that plateauing effect with the Rocket 620. The onboard controller scores an average read speed of 97.6 MB/s while the Rocket 620 scores 90.5 MB/s. This averages about 20 MB/s faster than the 2TB drive. The access times are hovering around 15.5 ms, which is lower than what Datamarck reported, but in line with what the AAM test reported. Below we see the result of the disk write test.
| Onboard | Rocket 620 |
Here we see a significant performance drop by the Rocket 620. The onboard controller scores an average 88.9 MB/s write speed while the Rocket 620 scores an average 62.0 MB/s. This is a bit of a difference and could be noticeable in day to day activity. The 2TB version of the Green Drive only measures in with 76.1 MB/s write speed.
| Onboard | Rocket 620 |
The file benchmark is supposed to give a more real world result, by testing the speed of reading and writing files of a certain size. We can see the Rocket 620 hovering around, but never quite passing the 100 MB/s threshold in read speed. With the onboard controller we see significant improvements in read speed. This just goes to show that it doesn’t matter how good a drive is if you don’t have a good storage controller backing it up.

Really an amazing high performance green drive with a capacity of about 3TB, which is in it self an amazing thing to read and share, even more to have one in your PC. Thanks for sharing it…..