ATTO Disk Benchmark is a relatively easy-to-use benchmark tool, which happens to be the benchmark of choice for many manufacturers. ATTO uses compressible data rather than random data, which results in higher performance and thus, higher benchmark scores. In our testing, we have selected the transfer size to range from 0.5KB to 8192KB, and have set the total length of the test to be 256MB.
The first test this Lexar Portable SSD encounters supplies promising results, with the read speeds reaching up to 435 MB/s and write speeds reaching 249 MB/s. We see here that while the read speeds don’t quite reach the listed specifications, the write speeds more than exceed them.
Crystal Disk Benchmark is visually straightforward, and is used for measuring the speeds at which your storage device reads and writes in both compressible (oFill/1Fill) and random, mostly incompressible, data. Random data is more consistent with everyday use of a computer, such as transferring videos, pictures and music. We run the benchmark twice, using oFill data first, and then proceeding to test with random data. Since results typically return with nearly identical scores, we only include the results for random data samples.
Moving to our next benchmark test, the Lexar Portable SSD shows similar results on both the read and write side of sequential testing.
AS SSD Benchmark uses incompressible data in their testing of SSDs, essentially providing results that would be consistent with using the heaviest workload, thus lower speeds are expected. Transfer speeds (MB/s) are seen in the left picture below and IOPS (Input/Output Operations Per Second) are on the right.
AS SSD is a brutal test for USB devices, we are actually surprised that this benchmark completed in a reasonable time frame, and with half decent results as well. Another interesting feature of the AS SSD Benchmark is that it also can test the duration and speeds of copying various files, this is an important test for our digital media professionals who require top transfer speeds.
The data transfer speeds were a little lower than we would have liked to have seen when it comes to transferring ISO, Program and Game files.