Performance in IOMark
We use our internal IOMark tool for low-level tests. Let’s begin with sequential reading.
- Data-transfer graph for Hitachi Deskstar 7K1000.C
- Data-transfer graph for Samsung EcoGreen F2
- Data-transfer graph for Samsung SpinPoint F3
- Data-transfer graph for Seagate Barracuda 7200.11
- Data-transfer graph for Seagate Barracuda 7200.12
- Data-transfer graph for Seagate Barracuda LP
- Data-transfer graph for Western Digital Caviar Black
- Data-transfer graph for Western Digital Caviar Blue (A7)
- Data-transfer graph for Western Digital Caviar Blue (M9)
- Data-transfer graph for Western Digital Caviar Blue (V1)
- Data-transfer graph for Western Digital Caviar Green, 16 MB
- Data-transfer graph for Western Digital Caviar Green, 32 MB
Let’s compare the drives according to the read speed at the beginning and end of the full-capacity partitions created on them.
The top speed depends on whether the first sectors of logical formatting are on a good head/surface pair or not. Therefore, we can only learn from the summary diagram that the two fastest 7200 RPM models have one platter each. These are the Samsung F3 and WD Blue V1. The data-transfer graphs also make it clear that the Seagate 7200.12 and the Hitachi 7K1000.C belong to this same generation of HDDs with 500GB platters, too. It is hard to say anything definite about the WD Blue M9. Let’s wait till the IOMeter tests.
It is simple with the power-efficient products. Every one of them, save for the WD AACS, is based on a single platter.
Now, let’s check out the speed of the cache buffer.
Hitachi Deskstar 7K1000.C
Alas, the Hitachi 7K1000.C draws an odd zigzagging graph that we already know from our tests of other new products from this company. There is absolutely no burst reading at some data block sizes.
Samsung Ecogreen F2
Samsung Spinpoint F3
The Samsung HDDs show what we already know from our recent comparison of 1-terabyte models: the EcoGreen F2 series behaves like the SpinPoint F1 series and has a characteristic reduction of burst write speed at large data blocks. The SpinPoint F3, on the contrary, produces a near-ideal graph.
Seagate Barracuda 7200.11
Seagate Barracuda 7200.12
Seagate Barracuda LP
The Seagate products show the results of the developer’s work on earlier errors: the 7200.11 series loses its speed suddenly on large data blocks whereas the newer series are better (although not yet perfect) in this respect.
Western Digital Caviar Black
Western Digital Caviar Blue (A7)
Western Digital Caviar Blue (M9)
Western Digital Caviar Blue (V1)
Western Digital Caviar Green, 16 MB
Western Digital Caviar Green, 32 MB
We don’t have much to say about the WD drives. They all work with the cache in the same manner and have minor flaws when writing large data blocks.
The Hitachi 7K1000.C has the highest burst read speed (but only when the data blocks are of a certain size) whereas the new series from Seagate (7200.12 and LP) and the Samsung F3 are the best overall.