7/6/2023 0 Comments Dip trace software![]() ![]() We also monitor cache recovery via multiple idle rounds. We use Iometer to hammer the SSD with sequential writes for 15 minutes to measure both the size of the write cache and performance after the cache is saturated. Sustained write speeds can suffer tremendously once the workload spills outside of the cache and into the "native" TLC or QLC flash. Most SSDs implement a write cache, which is a fast area of (usually) pseudo-SLC programmed flash that absorbs incoming data. Official write specifications are only part of the performance picture. Sustained Write Performance and Cache Recovery We are, in any case, more excited for the SM2268XT in the PCIe 4.0 space. Such a trade-off is visible with sustained write performance. Good things are possible with the flash being used, so perhaps this is just conservative controller optimization or design to offer third parties more options for their controllers. Random performance is often more important and here the Legend 960 unfortunately trails the competition. This is not the end of the world as the numbers are still pretty good. Sequential performance in CrystalDiskMark is also average. ![]() This may be peculiar to SMI’s current R8-based SSD controller architecture as we saw a similar pattern with the SM2269XT on the Solidigm P41 Plus. The sequential performance results are satisfactory, minus a dip with smaller reads at QD1.
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