We use the Quarch HD Programmable Power Module to gain a deeper understanding of power characteristics. Instead, it simply wrote at direct-to-TLC speeds of 990 MBps continuously. When left idle, our sample did not recover its SLC cache within our half-hour idle window. Still, when it did, speeds fluctuated very inconsistently from 60-500 MBps until the transfer was complete. It wasn't until we had written roughly 750GB of data that the SN750 SE's performance degraded again. Sure enough, performance didn't degrade as badly after the cache was exhausted, but this time the cache measured roughly 150GB before write speeds degraded to roughly 900 MBps. We then performed simple drag n' drop operations within Windows to double-check. This behavior was so strange that we retested, but the second series of tests revealed the same behavior. After writing roughly an additional 120GB of data while the cache was folding, write speeds shot up to a consistent 990 MBps for the remainder of the test. After absorbing roughly 70GB of data at 2.9 GBps, write speed plummeted to a very inconsistent average of 250 MBps, with lows landing below 100 MBps. Of course, my Intel Optane 905p spanks the Samsung drives in the 4KiB range - but the below drive is for storing GB files only.We noticed some peculiar behavior during sustained write testing that we believe is caused by the SN750 SE's DRAM-less architecture.
Write speeds are slightly down with the Raid 1, but I am happy enough overall. I then changed it to Raid 1, and got the result below. In fact, it seemed to be practically no faster than a single drive. Very disappointed as it should have been closer to 7000 MB/s. Interestingly, I tried Raid 0 first, and it only did 3603 MB/s read. So instead, I setup raid using the Windows Storage Spaces. I tried the VROC, but even with the Standard key, it would not let me create a Raid using the VROC - it seems that you really need Intel drives for this unless you have very specific drives and motherboard. I got two Samsung 970 Pros, but rather than plugging them into the M.2 slots on the motherboard (i7-9800X, Asus X299 Tuf Mark 2), I plugged them into the pci-e slots using riser cards. Getting good performance seems to be a challenge as the DMI is a bottleneck, and a lot of configurations do not work. Don't seem to be any fast results, so thought I would post mine as an fyi.
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