Tip: If you host PVE on ZFS check for storage pool upgrades after a major version upgrade (Example: 8 to 9)

[jkotran]

Hey,

My PVE hosts use zfs. After upgrading from 8 to 9 I had to do the following to upgrade zfs on disk. I didn't notice this in the upgrade manual:

sudo zpool status

(Check that your storage is healthy.)

sudo zpool upgrade rpool

Be sure to do something like that for any other storage pools that you may have.

 

[Stoiko Ivanov]

I didn't notice this in the upgrade manual:

The reason why we don't add it there is that this is a one-way street - once you've upgraded your zpools you cannot use a kernel that is shipping an older (minor) version for ZFS.

In general I'd recommend to rather upgrade a zpool if you need one of the new features and have ensured that your hardware runs fine with the current kernel!

I hope this explains it.

 

[jkotran]

Hey Stoiko,

Thank you for the thoughtful reply and for sharing your insight.

I agree with you.

Cheers