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Performance in IOMark

We use our internal IOMark tool for low-level tests. Let’s begin with sequential reading.

Let’s compare the drives according to the speed at the beginning and end of the full-capacity partitions created on them.

You can see that the new 7200RPM drives with 500GB platters are faster than their predecessors. Funnily enough, the new 5400RPM drives have the same linear speed as the old 7200RPM models with 333GB platters. Take note of the 5000RPM drive from Western Digital. Its top speed is somewhat lower than that of its 5400RPM cousin but its bottom speed is much higher. This top to bottom speed ratio differs from the typical 2:1 and is usually observed with HDDs that have reduced-width platters. Is it the result of the developer’s attempt to transition to a higher recording density? Otherwise, it wouldn’t be possible to have 500 gigabytes of storage space on a reduced-width platter. Well, let’s just wait for the results of our response time measurements.

The WD10EARS with its unusual sectors does not deliver any advantages.

Now, what about the cache access speed? We’ve got rather interesting results here.

Hitachi Deskstar 7K1000.B: work with the buffer

Hitachi Deskstar 7K1000.C: work with the buffer

Hitachi’s new Deskstar 1000.C shows us a terrible picture that we already saw with the 7K2000. It has inexplicable slumps at reading and its writing speed goes up but temporarily. The overall performance is very low. This HDD seems to have got the new firmware which cannot draw a nice-looking cache access graph.

Samsung Spinpoint F1: work with the buffer

Samsung EcoGreen F2: work with the buffer

Samsung Spinpoint F3: work with the buffer

Samsung’s HDDs are steadily getting better and better. The F1 series was good. The EcoGreen F2 draws a smooth beginning of the graph but has some problems with writing large data chunks, and the F3 can be regarded as a perfect example.

Western Digital Caviar Green WD10EADS-00M2B0: work with the buffer

Western Digital Caviar Green WD10EADS-00P8B0: work with the buffer

Western Digital Caviar Green WD10EARS-00Y5B1: work with the buffer

Western Digital Caviar Black WD1001FALS-00J7B0: work with the buffer

Western Digital Caviar Black WD1001FALS-00E8B0: work with the buffer

Western Digital tries to use unified firmware for all its products, and its HDDs all show the same behavior. It is hard to see any difference in this test: all of the models deliver an excellent speed of reading and have some fluctuations of speed when writing large data chunks.

The Hitachi 7K1000.B is the first in terms of top speeds. It is closely followed by Samsung’s HDDs.

 
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