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 consistent with files larger than 64KB. The average reading speed was about 550 MB/s and the writing speed was 520 MB/s.

The Toshiba SSD was also very fast in the sequential reading test of small, 4K files:

Sequential writing of small, compressible files was also fast although not the fastest we have seen from an SSD:

Going further to larger file transfers, the HG6 SSD remained fast in both reading and writing tests: