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Product review: four 750 GB to 1 Terabyte SATA HDDs
by Marc Prieur
Published on October 1er, 2007

Power consumption
Here we have the power consumption for each hard drive using a clip-on ammeter on the 5V and 12V lines of each model.


As we could have guessed, the Hitachi 7K1000 1 TB consumes the most power, however, all were quite close.
Temperature
Next, we measured the hard drive temperature after two hours of intensive use with IOMeter. These results are with the HDD out of its casing, without ventilation, and each slightly raised. Temperature is taken using an infrared thermometer in two areas; in middle on top of the drive and on the hottest part on the left side. Finally, we also give you the temperature as reported by the drive’s internal probe.


Here again, it’s logically the 7K1000 1 TB that heats up the most with a 10°C difference compared to the best 500 GB drive. And actually, we are at a level comparable to the Hitatchi E7K500 500 GB which is also composed of 5 platters. Amongst the 750 GB drives, results are close and the standing varies depending on the point of measurement.
Noise levels
For this measurement, we place each hard drive in a Textorm jelly case in order to avoid any vibration from the desk with a sound probe 12 cm above. Of course, the PC we in this test is fanless so that we can isolate the hard drive’s sound level :


In rotation, all of these hard drives are close and more than audible and they could not really be part of a « silent » PC configuration. It’s especially during access that this difference is heard, with a particularly noisy WD7500AAKS. This is a bad surprise compared to its little brother, the WD5000AAKS. For once, Seagate gives up its usual last place, however, note that it is possible to activate acoustic management for the Western hard drive to the detriment of access time, something not possible with the Seagate model. In the end, it’s Hitachi that offers the least noisy product during access for this size capacity.

To have a better ideal of the level of noise produced by these hard drives, here are some recordings taken with a Roland portable Edirol R-09 recorder placed 12cm above the drive. We recorded 15 seconds in rotation, then 15 seconds in access with acoustic management (except for the Seagate) and finally 15 seconds without acoustic management.

- Hitachi 7K1000 1 To
- Hitachi 7K1000 750 Go
- Seagate Barracuda 7200.10
- Western Digital Caviar SE16 – WD7500AAKS

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