[dzr0001]

What drive is this and does it need a trim? Not all NVMe devices are created equal, especially in consumer drives. In a previous role I was responsible for qualifying drives. Any datacenter or enterprise class drive that had that sort of latency in direct IO write benchmarks after proper pre-conditioning would have failed our validation.

[jstimpfle]

My current one reads SAMSUNG MZVL21T0HCLR-00BH1 and is built into a quite new work laptop. I can't get below around 250us avg.

On my older system I had a WD_BLACK SN850X but had it connected to an M.1 slot which may be limiting. This is where I measured 1-2ms latency.

Is there any good place to get numbers of what is possible with enterprise hardware today? I've struggled for some time to find a good source.

[dzr0001]

Unfortunately, this data is harder to find than it should be. For instance, just looking at Kioxia, which I've found to be very performant, their datasheets for the CD series drives don't mention write latency at all. Blocks and Files[1] mentions that they claim <255us average, so they must have published that somewhere. This is why we would extensively test multiple units ourselves, following proper preconditioning as defined by SNIA. Averaging 250us for direct writes is pretty good.

[1] https://blocksandfiles.com/2023/08/07/kioxias-rocketship-dat...