Sadog

Many Thanks. I have tested the zpool in serveral hours with the setting "nvme_core.default_ps_max_latency_us=0 pcie_aspm=off pcie_port_pm=off", and everthing is fine

I have a zfs cache pool (raidz1) and will randomly get degraed with random nvme to down. in the syslog will see the follwing zio pool=cache vdev=/dev/nvme6n1p1 error=5 type=6 offset=189249257472 size=45056 flags=524480 These 7 nvmes are attaced in a PLX8749 cards (max to 8 nvmes) These 7 nvmes are healthy, and for each time it will choose a different nvme to get down. I don't know why tower-diagnostics-20250116-2115.zip

any update? thanks