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Multithreaded Read & Write Patterns

The multithreaded tests simulate a situation when there are one to four clients accessing the hard disk at the same time – the clients’ address zones do not overlap. We will discuss diagrams for a request queue of 1 as the most illustrative ones. When the queue is 2 or more requests long, the speed doesn’t depend much on the number of applications. You can also click the following links for the full results:

Multithreaded reading tests often produce unexpected results. Here, it is the Hitachi 7K1000.C that beats the others with two data threads. Its performance is almost the same as when reading one thread only. Finally, we’ve found something good in its firmware! The 7K1000.B is not so fast.

Samsung can also be praised for the work they have done on firmware. The Samsung F3 has been cured from the terrible performance hit we’ve seen with other Samsung drives over the last two years (you can still see it with the EcoGreen F2 series).

Western Digital’s drives are stable and cope with the multithreaded load well enough, yet their performance is not high here.

There are a couple of things we want to note about these results. First, the P8 version WD10EADS has much better results than the other models of the same series although we can’t tell you why it is better. And second, the Samsung F3 slows down at four threads almost to the level of its predecessors. So, while the company is on the right way, there is still a lot of work to be done with the firmware.

None of the HDDs seems to have any problems with multithreaded writing but we must name the winner. It is the Samsung F3 that copes best with writing multiple data threads.

 
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