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.
Performance highs of 550MB/s read and 508MB/s write are a bit lower than that in which we saw with the 240GB version and as described in the manufacturers listed specifications.
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 SanDisk Extreme II SSD, performance results are very similar whether we test with compressible or incompressible data and, for this reason, results are displayed utilizing incompressible data.
Although Crystal DiskMark results are a bit lower than ATTO, this is typical and these are still very strong speeds.
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. We have displayed transfer speed results on the left with IOPS on the right:
These are great results for such a value-targeted SSD. Not only is the Total Score of 1072 very encouraging, but also, we don’t often see such high read and write 4K IOPS. The only ‘slight’ concern we have comes in with the Copy Bench test seen here, where two of the speeds were amazing SAT 3 results with the Program transfer result being a bit slow. This was the same as we had seen with the 240GB version.