Samsung 840 Series SSD: Cost-Efficient Performance

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ATTO Disk Benchmark

ATTO is another "quick and dirty" type of disk benchmark that measures transfer speeds across a specific volume length. It measures raw transfer rates for both reads and writes and graphs them out in an easily interpreted chart. We chose .5kb through 8192kb transfer sizes and a queue depth of 6 over a total max volume length of 256MB. ATTO's workloads are sequential in nature and measure raw bandwidth, rather than I/O response time, access latency, etc. This test was performed on blank, formatted drives with default NTFS partitions in Windows 7 x64.

ATTO Disk Benchmark
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Following what we saw in the SANDRA test, this SSD’s read score is far better than its write score in ATTO, both relative to itself and to the entire test bank. While the Samsung 840 posted nice numbers in the write test with the smallest transfer sizes--second only to the OCZ Vertex 4--it planed out hard right at the 4KB transfer size mark and stayed there, where it ended up with the lowest score most of the rest of the way out.

On the other hand with respect to read performance, the Samsung 840 cleaned up, starting out incredibly strong and maintaining the top throughput for the entire read test.

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