In the Database pattern the drive is processing a stream of requests to read and write 8KB random-address data blocks. The ratio of read to write requests is changing from 0% to 100% with a step of 10% throughout the test while the request queue depth varies from 1 to 256.
You can click the following links to view the tabled results:
We will build diagrams for request queue depths of 1, 16 and 256.
The Seagate 7200.11 (its server version shows middling performance again), Samsung and Hitachi are fighting for first place. We guess the Seagate should be considered the overall winner. Having the same speed of writing, it is ahead of its opponent under mixed loads (when there is about the same share of writes and reads) and at reading.
The WD7501AYPS is outstanding again as it takes fourth place, enjoying a considerable lead over all the four-platter models, except for the Hitachi, and outperforming the Seagate ES.
The Seagate 7200.11 is an obvious leader now that the load is increased. Its server version from the ES.2 series has improved its position relative to the other HDDs. Having the best speed at pure reading, it has a performance slump at 30-40% writes. Its pure writing speed is not what a leader should deliver, either.
It is more difficult to name the drives that take second and third places. The Samsung and Hitachi cope best with writing, but reading is more important for databases. Mixed loads are important too, and these drives both have a serious slump under mixed loads. Thus, second place must be given to the WD7501AYPS, the sensation of this test session. This HDD produces outstanding results indeed.
When the load grows even higher, we see a top three consisting of Seagate’s two new models and the updated Western Digital RE2-GP. The Hitachi is fourth, the Samsung is fifth, and the others are far behind.