Comment by giov4
10 hours ago
I killed 2x 4tb Nvme drives on Pciexpress with ZFS raid1 under proxmox, got them replaced, tried again on both pci-express and usb adapter kept getting io problems there too with zfs, drive gets disconnected during scrub or high load, tried already kernel or power management options for pciexpress and usb without sucess, managed to reproduce with high load.
or proxmox ( especially community edition) is fucked or zfs is still unstable, surprisingly with different drives on different interfaces I obtained same results, didnt swap proxmox for clean os, that might being some changes since modules and options would be different i guess. ( drives firmware etc are fine and performing well when inspected with proprietary windows tools)
just search zfs nvme pcie or usb problema or disconnect and you see similar stability problem for different users in different cases (os, drives etc), but also unraid and others, maybe somewhere is rithe right combo of options/glitches but didnt find it yet
> usb adapter kept getting io problems there too with zfs, drive gets disconnected during scrub or high load
That's usually caused by the adapter chipset overheating. Don't use USB adapters for important data.