ZFS attach disk to raidz1 "feature raidz_expansion unsupported by kernel"

[Erik_ch]

As you probably know ZFS supports attaching a new disk to an existing raidz1 vdev since autoumn 2023. A feature flag named "raidz_epansion" must be enabled. see pull request ZFS on Github. Truenas already supports the expansion already officially. Therefore it should be stable.

I tried to set this flag on Proxmox because I want to add a new disk to a 3-disk raidz1. I get the error message: cannot set property for 'pool': feature 'raidz_expansion' unsupported by kernel.

Is it possible to updated the kernel of proxmox to the newest ZFS version. In a later step the GUI could be extended with an attach disk button.

Thank you very much.

 

[Kingneutron]

If you need this in place right away - do a full backup and rebuild the raidz pool with the additional disk.

 

[UdoB]

Is it possible to updated the kernel of proxmox to the newest ZFS version.

Sure!

The latest release is 2.2.6 and it is already included in PVE. --> https://github.com/openzfs/zfs/releases

RaidZ expansion comes with 2.3.0. I really hope Proxmox will not include that one... before it is released!

 

[Erik_ch]

Sure!

The latest release is 2.2.6 and it is already included in PVE. --> https://github.com/openzfs/zfs/releases

RaidZ expansion comes with 2.3.0. I really hope Proxmox will not include that one... before it is released!

Thank you very much for your clarification. I only have seen the PR of ZFS expansion. I thought if TrueNAS uses this functionality that it is stable already. I understand that Proxmox doesn't distribute an RC version.

I will recreate the ZFS pool.

 

[UdoB]

RaidZ expansion comes with 2.3.0.

Released today: https://github.com/openzfs/zfs/releases/tag/zfs-2.3.0