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.
Both ATTO read and write results placed higher than listed specifications of 534MB/s read and 482MB/s write data transfer speeds. Very encouraging is the fact that, even at 4K file size, both read and write performance is already increasing rapidly.
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. Performance is virtually identical, regardless of data sample so we have included only that using random data samples:
Great high sequential scores are again seen with crystal DiskMark but, even more surprising, is that the low 4K random write score is one of the highest we have seen to date from SSDs.
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.
AS SSD provides a first look at 4K IOPS and, while 85101 IOPS is just below the listed spec of 90K. 47590 low 4K write IOPS are well above the listed 35K. Decent SATA 3 results were also seen in the AS SSD Copy Bench result:
You may not see this for long (and it’s definitely not common) but you get a freebee simply for reading! Over the last little while, we have been assisting with beta testing new benchmark software called Anvil Storage Utilities which is an absolutely amazing SSD benchmarking utility. Not only does it have a preset SSD benchmark, but also, it has included such things as endurance testing and threaded I/O read, write and mixed tests, all of which are very simple to understand and use in our benchmark testing.
The Total Score of 4046 is an excellent result from Anvil Storage utilities and it is very rare that we see any SSD hit the 100MB/s mark in lo 4K random write testing.