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Performance in IOMeter

Sequential Read & Write Patterns

From the low-level IOMark to the synthetic IOMeter. IOMeter is sending a stream of read and write requests with a request queue depth of 4. The size of the requested data block is changed each minute, so that we could see the dependence of the drive’s sequential read/write speed on the size of the data block. This test is indicative of the maximum speed the drive can achieve.

The numeric data can be viewed in tables. We will discuss graphs and diagrams.

The Seagate 7200.11 boasts the highest speed in this test, too. However, on small data chunks it is inferior to all the new HDDs, save for the Samsung which accelerates to its top speed rather sluggishly. The Samsung’s top speed is somewhat higher than that of three models from Western Digital, though. The fourth Western Digital, the RE4-GP model, is faster than its cousins throughout the test.

The Seagate LP is the best of the power-efficient models. Its extra 500rpm seem to show up here.

We don’t see anything particularly new when we switch from sequential reading to sequential writing. We’ve got the same two drives from Seagate as leaders, and the Samsung is again slow on small data chunks.

 
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