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 and 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.

The BX100's reading and writing performance with compressible files was stable with files larger than 128KB. The read speed hit the 560MB/s and the write speed reached the 455 MB/s - both higher than the performance figures quoted by Crucial.

Let's take the performance with 4KB files. The BX100 1TB SSD was very fast in the reading part, as you see below:

Writing of small 4KB files was a bit slower than the performance of the Crucial "M" series of SSDs:

Going further to larger 2MB file transfers, the BX100 SSD was very fast in the read test, and also managed to stay within expectations (for a budget SSD) in the write part: