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.
Specifications listed 540MB/s read and 430MB/s write transfer performance and ATTO is very close to that. ATTO represents the easiest in data transfer as it uses highly compressible data and testing with highly incompressible data will paint a better picture.
Crystal Disk Benchmark is used to measure read and write performance through sampling of raw (0/1 Fill/compressible) or random data which is, for the most part, incompressible. In the Plextor M5M 256GB mSATA SSD, performance results are very similar whether we test with compressible or incompressible data and, for this reason, results are displayed utilizing incompressible data.
Typical of Crystal Diskmark, performance drops just a bit, however, we need to consider that we are testing with random, or highly incompressible, data samples. This is an excellent result even with the low 4k random write result a bit lower than normal.
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 always hope to see the AS SSD Total Score above 1000, however, our first look at read and write 4k-64Thrd IOPS results is very encouraging. With IOPS like this, we might see some excellent PCMark Vantage transfer speeds.
The AS SSD Copy Benchmark creates 3 files that we might see on a normal basis (ISO/Program/Game) and transfers them from one spot on the SSD to another, keeping track of the maximum transfer speeds reached and the time it took to transfer the files. This result shows excellent SATA 3 results when moving the ISO and Game but the Program transfer left something to be desired. We repeated the test three times to ensure the first test result wasn’t a fluke. All were consistent.