NVMe passthrough to TrueNAS - Failed to start zfs-import-scan.service

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rtorres

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Apr 3, 2024
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Hello all,


I have an NVMe that I passed through to a TrueNAS VM as a sole network storage device. After passing through via Proxmox and configuring TrueNAS to use the drive as a NAS, I have seen the 'Failed to start zfs-import-scan.service - Import ZFS pools by device scanning.' error after every boot.

What can I do to resolve the error message?

Thank you in advance! :)


root@elitemini:~# systemctl status zfs-import-scan.service
× zfs-import-scan.service - Import ZFS pools by device scanning
Loaded: loaded (/lib/systemd/system/zfs-import-scan.service; enabled; preset: disabled)
Active: failed (Result: exit-code) since Sat 2024-06-01 01:47:39 PDT; 21h ago
Docs: man:zpool(8)
Process: 762 ExecStart=/sbin/zpool import -aN -d /dev/disk/by-id -o cachefile=none $ZPOOL_IMPORT_OPTS (code=exited, status=1/FAILURE)
Main PID: 762 (code=exited, status=1/FAILURE)
CPU: 27ms

Jun 01 01:47:39 elitemini systemd[1]: Starting zfs-import-scan.service - Import ZFS pools by device scanning...
Jun 01 01:47:39 elitemini zpool[762]: cannot import 'Elite Mini NAS Drive': pool was previously in use from another system.
Jun 01 01:47:39 elitemini zpool[762]: Last accessed by truenas (hostid=141d4132) at Sat Jun 1 01:46:39 2024
Jun 01 01:47:39 elitemini zpool[762]: The pool can be imported, use 'zpool import -f' to import the pool.
Jun 01 01:47:39 elitemini zpool[762]: cannot import 'boot-pool': pool was previously in use from another system.
Jun 01 01:47:39 elitemini zpool[762]: Last accessed by <unknown> (hostid=0) at Wed Dec 31 16:00:00 1969
Jun 01 01:47:39 elitemini zpool[762]: The pool can be imported, use 'zpool import -f' to import the pool.
Jun 01 01:47:39 elitemini systemd[1]: zfs-import-scan.service: Main process exited, code=exited, status=1/FAILURE
Jun 01 01:47:39 elitemini systemd[1]: zfs-import-scan.service: Failed with result 'exit-code'.
Jun 01 01:47:39 elitemini systemd[1]: Failed to start zfs-import-scan.service - Import ZFS pools by device scanning.
 
Did you use PCIe passthrough? Try hiding the NVMe from Proxmox by early binding to vfio-pci (and you might need a softdep to make sure the vfio-pci driver loads before nvme driver). This would be very similar to making sure a GPU is not touched by Proxmox before starting the VM with passthrough. (Don't blacklist nvme if you have other NVMe drives!)
 
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leesteken said:
Did you use PCIe passthrough? Try hiding the NVMe from Proxmox by early binding to vfio-pci (and you might need a softdep to make sure the vfio-pci driver loads before nvme driver). This would be very similar to making sure a GPU is not touched by Proxmox before starting the VM with passthrough. (Don't blacklist nvme if you have other NVMe drives!)
Click to expand...
Thank you for your ultra fast response!

I did do it through PCIe passthrough to the VM via this command:
qm set 102 -scsi1 /dev/disk/by-id/nvme-model-and-serial-here

and made an edit to /etc/pve/qemu-server/102.conf to add serial # (since per video it is a requirement for trueNAS to have a serial number on the drive)

Considering I am very new to passthrough, what would be the command to early binding to vfio-pci?

I do have another NVMe in the system that Proxmox boots from. Would this also be affected?

Thanks again!
 
rtorres said:
I did do it through PCIe passthrough to the VM via this command:
qm set 102 -scsi1 /dev/disk/by-id/nvme-model-and-serial-here
Click to expand...
That is NOT PCIe passthrough, that is disk passthrough. Ignore my previous suggestions. I don't know how to help in this case. (PCIe passthrough comes with lots of caveats, so I don't recommend it either.)
 
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I know this is an old thread, but did anyone have a solution?
I am in the exact same situation... Followed guides on setting up TrueNas on Proxmox with Disk Passthrough, and it worked fine - until I reeboted the proxmox server...
With so many guides out there all describing the same approach i think its wird noone have mentioned or resolved it earlier

When it comes to this error the whole system halts, its not booting up
 
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