Motherboard died, now the pool says: This pool uses the following features not supported

[Murux]

Hey guys, I need some help,


to explain the situation:

I decided to upgrade my system, new motherboard, more drives. A day before arrival of the parts, my motherboard died. After I assembled the new system and booted it up (all drives are still fine).

I just tried to fire up the VM again, after I reached the web interface, there is no pool, and there is no pool to import...

I searched for 2 days now, tried multiple possible solutions, but nothing helped. I tried to import with "-f" and with "-f -o readonly=on" but still no pool to import.

Did I miss something, or am I doing something wrong?

Here is the log from the shell.

 

[Samuel Tai]

A little more information, please. First, is this FreeNAS or TrueNAS, and which version? Next, were you running this on bare metal or as a VM? If a VM, how did you present the drives to FreeNAS/TrueNAS: via passing through an HBA or using Direct Access?

 

[Murux]

oh sorry,
im using FreeNAS-11.3-U5 on an VM on Windows Server 2019 Standart, im passing them trugh an LSI SAS 9207-8i

 

[Samuel Tai]

Have you tried booting your VM on TrueNAS instead and importing then? Your pool has ZFS feature flags set that are more recent than FreeNAS 11.3.

 

[Murux]

Can you please explain what you mean with booting on TrueNAS,
should I create an VM with TrueNAS and try it then?

 

[Samuel Tai]

Exactly.

 

[Murux]

Wow, it worked, you are my savior.
Do you know what I did wrong?

 

[Arwen]

It's simple. Your prior instance of (Free/True)NAS used ZFS features not available in FreeNAS-11.3-U5. So you could not have been using FreeNAS-11.3-U5. With the result you could not import your pool.

In someways I am cautious about upgrading my own ZFS pools to use newer features. Especially my Linux boot pools, (because of potential Grub problems, or recovery media boot problems). Even the extra pools each computer has, I generally don't bother to update unless I see something that might help, (speed or reliability).