--directory makes those files automatically for you actually, I think those numbers are pretty good. you can zpool export to unmount and then run a non-destruc

--directory makes those files automatically for you actually, I think those numbers are pretty good. you can zpool export to unmount and then run a non-destructive read test with --filename=/dev/nvme0n1:/dev/nvme0n2... and check that the raw devices get, say, 80%-99% of the advertised speed. Then you can create a "raw" zvol (no filesystem) with: create -b 128K -V 100G tank/testme You can do a benchmark with --filename=/dev/zvol/tank/testme and it should only be testing the striping and raidz stuff. I could get like 65% of the ideal. Running through the ZFS filesystem seemed to slow down by a good 50% of the ideal. None of this has been tuned. So to see 20GB/s+ seems pretty good to me.