[ADefenestrator]

The Samsung consumer drives definitely don't do well under sustained high write workloads. The SLC cache fills up after a while, and write speeds drop drastically. The They also have some variety of internal head-of-line blocking type issue, where read latency goes way up when the writes saturate. I can't say I've ever seen 1s latency out of them, though.

Consumer drives can definitely have some quirks. The 2TB 960 Pro also just had weird write latency, even under relatively moderate load. Like 2-4ms instead of <1ms. It didn't really get much worse with extra load and concurrency, except that if there's writes enqueued the reads end up waiting behind them for some reason and also seeing the latency penalty.

They can also be weird behind RAID controllers, though I'm not sure if JBOD counts there. For whatever reason, the 860 EVO line wouldn't pass TRIM through the SAS RAID controller, but the 860 PRO would.