One of the finest tools available to measure storage performance is ATTO. I love it to death as it is so reliable and produces such accurate results. The great thing about ATTO is that we can test with predefined block sizes. So we can test with a 32MB sequence of 4KB files, yet also 32MB in 1MB files. This gives us an excellent scope of overall performance with small and large files.
ATTO Write performance
The most important and difficult task for any storage unit is ... writing really small files fast, so let's start off there and have look at that with this WRITE test. We scale 4KB block sizes to 1024KB block sizes in bursts of 256MB with a queue depth of 4 and then measure how fast the storage device is dealing with them. The storage units we used:
OCZ Vertex 120GB (MLC) Indilinx Barefoot
OCZ Vertex 2 100GB (MLC) SandForce SF1200
G.Skill Phoenix 100GB (MLC) SandForce SF1200
G.Skill Phoenix 120GB (MLC) SandForce SF1200
We recently added the latest revision of the Western Digital WD1500HLFS VelociRaptor to our test suite, it is considered amongst the fastest and most expensive 10k RPM HDD your money can get you. It's read/write performance is unprecedented good for a traditional/mechanical HDD of course.
Then the original OCZ Vertex, then the OCZ Vertex 2 in yellow (fall under the phoenix lines) and finally in red, the MLC based Phoenix nearing ~250MB/sec write performance.
Look at the 4KB file size test by the way and compare it to the Indilinx product in green, that is astonishingly good. That's the strength of the SandForce controllers.
ATTO Read performance
The previous test was write performance, but let's have a peek at read performance. The SandForce-1200 controller based SSDs kicks ass and definitely take a lead in this particular benchmark.
The SSDs are all really fast, but that's 282 MB/sec read performance when it's peaking. And again look at the tremendous increase in small file operation performance. Again that's more than double of Indilinx based products up-to 64KB in this particular test.
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