Cannot import pool, one or more devices is currently offline

TrueNAS General
1

I am trying to import a pool from another tnas server, the pool was exported on the other server but when trying to import on the new server, I get the one or more devices is currently offline…

All drives are online and show correctly in the new server(see below)… What could be the problem here?

root@SERVERNAME[~]# zpool import
pool: LFF
id: 9496780984047411288
state: ONLINE
status: The pool was last accessed by another system.
action: The pool can be imported using its name or numeric identifier and
the ‘-f’ flag.
config:

    LFF                                       ONLINE
      mirror-0                                ONLINE
        57670c90-1efc-48e3-8fcd-2348769a33b4  ONLINE
        53eb2a50-2eba-45b9-8539-12e8c5db3f42  ONLINE
      mirror-1                                ONLINE
        9966ac63-a3d4-473c-93a2-a14b971da23e  ONLINE
        60ae2b7f-af85-4448-bf23-4f69ced435f0  ONLINE
      mirror-2                                ONLINE
        b34ff704-81e9-4fcc-acb6-8d38ff3adbef  ONLINE
        89ffdeef-efe8-48ac-a51c-c2e089a09c85  ONLINE
      mirror-3                                ONLINE
        cbd99b32-d3f1-49a8-8fab-c9fcde727979  ONLINE
        3bc9aac1-82f4-4d80-9e6f-4cf8c0d45406  ONLINE
      mirror-4                                ONLINE
        cdbd557b-e121-442d-a290-26b2487646a9  ONLINE
        ddb69dca-cd1e-4015-b0eb-35e7a9768adb  ONLINE
      mirror-5                                ONLINE
        c3253987-6a62-4d32-99b0-3c7145e08283  ONLINE
        24f4fdde-4747-4cb0-b220-c1c9afba2c08  ONLINE
2

Physically different server, no hypervisor involved?

You can use the -f flag, as instructed.

zpool import -f -R /mnt LFF
3

Correct, physically different server… Both servers are hooked to HP storage enclosures with SAS cables…

4

Why would the import need to be forced if everything is online?

5

Because for whatever reason, it wasn’t properly recorded as having been exported on the previous system.

Here’s an excerpt from the OpenZFS documentation:

If a device is removed from a system without running zpool export first, the device appears as potentially active. It cannot be determined if this was a failed export, or whether the device is really in use from another host. To import a pool in this state, the -f option is required.

Source:
https://openzfs.github.io/openzfs-docs/man/master/8/zpool-import.8.html

6

Should I export it using zpool export instead of through the Truenas gui then?

7

What do you mean should you export it?

You said you already exported it on the other server. Are you saying it’s currently imported and active?

8

No, I exported it using the export option in the truenas gui… After it failed to import on the new server, I imported it back into the old one…

Should I try to export it using the “zpool export” command in cli instead of using the export option in the truenas gui?

9

Using the GUI to export it is the preferred method, as TrueNAS tries to handle it cleanly and works with the middleware.