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.
The Toshiba THNSNH128G8NT 128GB PCIe SSD should be performing at 534MB/s read and about 471MB/s write performance in this test but, as one can see, write performance is significantly lower. In most cases this is the result of pre-configured systems that contain additional bloatware, and not the SSD itself.
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.
As low as the write performance seems to be, low 4K random write speeds of 93MB/s are decent.
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.
Although we received similar results in AS SSD with respect to high sequential reads and writes, we were a bit confused as the software didn’t recognize the SSD and, in fact couldn’t complete tests for read access times. We were pleased to see that the 4K read IOPS exceeded specifications of 80,000 IOPS.
As well, we would have aspired to see transfer speeds hitting the SATA 3 range in the AS SSD Copy Benchmark.
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.