adding another disk to an existing vdev

[Freddie Cash]

On Sun., Mar. 7, 2021, 9:25 a.m. tech-lists, <tech-lists at zyxst.net> wrote:

> Hi,
>
> Say there are 4 identical disks in total. Three of them are in an
> already-existing raidz1-0 vdev.
>
> Can I add this fourth disk to the vdev? Will it still be a raidz1-0
> vdev?
>
> Will I need to eg resilver/scrub/anything else ?
>
> There are some answers for this question being "no" but these are from a
> decade ago. Is it possible now?
>
> Context is recent stable/12. The context can be changed if required.
>

No, you cannot extend a raidz vdev by adding disks to it. The number of
drives in a raidz vdev is fixed at creation time.

Cheers,
Freddie

Typos due to smartphone keyboard.

>