The MP400 performs better in our 4-threaded 4K random write test than it does with the read tests although the best result of 271,327 IOPS (QD32) is still way off the official maximum of 560,000 IOPS. As with the read tests, we did a quick test of the drive using 8 threads at QD32 which yielded a figure of 493,280 IOPS, much improved, but still way short of the official figure.
4K Random Write v QD Performance Compared
The drive performs solidly at QD1 (162,087 IOPS) before dropping sharply at QD2 (106,396 IOPS) but it recovers pretty well so that by the time the test finishes at QD32, the performance has risen to 271,327 IOPS.