The next software we used was the ATTO Disk Benchmark. The tool measures storage systems performance with various transfer sizes and test lengths for reads and writes. The benchmark performs file transfers ranging from 0.5 KB to 8192 KB. ATTO can be adjusted to do overlapped I/O, in a variety of queue depths. We tested the SSD using the benchmark's default settings, using 256KB file length performance and QD4. ATTO probably gives the most accurate results for compressible read and write data.

As you see above the drive's reading and writing performance with compressible files was pretty stable with files larger than 128KB. The average reading speed was about 520 MB/s and the writing speed was 480 MB/s.

However, the MX100 drive is suffering a bit in the sequential reading of 4KB or smaller files -- an issue also met when we tested the M550 SSD:

On the other hand, the Crucial MX100 drive was fast when it was writing such small, compressible files:

Going further to larger file transfers, the MX100 drive remained fast, especially in the reading part: