ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.
Initial results of 556MB/s read and 511MB/s write are very encouraging, keeping in mind of course that compressible data testing is only a very small part of the complete picture. Incompressible data test results could make or break the BP4.
Crystal Disk Benchmark is used to measure read and write performance through sampling of highly compressible data (oFill/1Fill), or random data which is, for the most part, incompressible. In the MyDigitalSSD BP4, we have provided the result with random data samples as both results were extremely similar.
We can see that testing with incompressible data yields considerably different results when examining write transfer performance. High sequential results of 375MB/s write performance are pretty good considering that we are examining a value driven mid-range SSD, one that the typical consumer might buy. Frankly, the typical consumer will never be able to visually observe a difference in any SSD when utilizing their system for typical daily use.
Up until recently, AS SSD was the only benchmark created specifically for SSD testing and it uses incompressible data. AS SSD, for the most part, gives us the worst case scenario in SSD transfer speeds because of its use of incompressible data and many enthusiasts like to AS SSD for their needs. Transfer speeds are displayed on the left with IOPS results on the right.
We can identify lower transfer speed results in AS SSD through the use of highly incompressible data. 4K-64Thrd IOPS of 62530 is fairly decent as is the very quick disk access speeds (Acc. Time). The AS SSD Copy Benchmark results were also very good with SATA 3 speeds over 400MB/s in two of the tests as well as very quick times in all three file transfer scenarios.