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.
ATTO result progression is solid and results of 550MB/s read and 522MB/s write are expected considering the interface.
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. We have provided the results of testing in highly compressible data on the left and that of highly incompressible data on the right.
Crystal Diskmark provides us with the first opportunity to see the significant performance deviation when testing in compressible (left) vice incompressible data (right). Possible reason for this drop could be the drive being a very early prototype, or even that the memory may be asynchronous as its exact makeup can’t be confirmed.
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.
Things look a bit different with AS SSD where low IOPS and that high sequential write speed result in a very low Total Score. Looking at the Copy Bench below, things look similar where we have decent results when copying an ISO and game, yet speeds suffered in transfer of the Program.