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. Many new SandForce Driven SSD owners who cant wait to test the performance of their SSD often grab this program and run a quick test, not realizing that they are testing with incompressible data rather than compressible data used in testing by manufacturers. We have provided compressible (oFill) results on the left with incompressible (random data) results on the right.
The 4k random write performance of 85MB/s is decent but we expected the high sequential write results from the result on the right, where highly compressible data was used for testing, to be somewhat higher as premium synchronous NAND flash memory is being used by the SSD.
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 while using SandForce Driven SSDs as they use compression in storage as discussed earlier. Many enthusiasts like to benchmark with AS SSD for their needs.
The AS SSD result backs up what we had seen above and adds a bit more with favorable disk access times, as well as, IOPS results that are a bit lower than advertised. Anvil should help us out with pushing these IOPS scores up though.
AS SSD Copy Benchmark is a very simple ‘true to life’ benchmark program where files, similar to that of a ISO, program and game, are transferred from one point to another. The resulting time that the transfer takes and maximum transfer speed reached is shown which, in this case, is a great result.
ANVIL STORAGE UTILITIES PROFESSIONAL
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 utilize in our benchmark testing.
Anvil is probably the best in SSD benchmark testing and, as we can see, there are some very low disk access times (Resp. Time), nice transfer speeds and we can see that the IOPS, not only improved from what we saw of AS SSD but also, they even surpass the listed specifications by 15,000 IOPS.