ZFS auto expand mirror

[Ben Stuyts]

On 19 sep. 2011, at 19:49, Freddie Cash wrote:

> On Mon, Sep 19, 2011 at 10:08 AM, Ben Stuyts <ben at altesco.nl> wrote:
> I want to expand an existing mirror by replacing the existing drives with bigger ones. This is on:
> FreeBSD xxx 7.3-STABLE FreeBSD 7.3-STABLE #2: Mon Sep 20 18:36:08 CEST 2010     root at xxx:/usr/obj/usr/src/sys/xxx  amd64
> 
> # zpool status home
>  pool: home
>  state: ONLINE
>  scrub: scrub completed after 2h0m with 0 errors on Mon Sep 19 18:25:45 2011
> config:
> 
>        NAME        STATE     READ WRITE CKSUM
>        home        ONLINE       0     0     0
>          mirror    ONLINE       0     0     0
>            ad5s1a  ONLINE       0     0     0
>            ad7s1a  ONLINE       0     0     0
> 
> Will this version of FreeBSD auto-expand to the new, bigger drive size once they are both replaced? I did not see the autoexpand property in this pool. zpool is v13, zfs is v3.
> 
> No.  You will need to reboot the system in order for the extra space to become usable in the pool.  Or, if none of the OS is installed on the pool, you can export/import the pool to make the new space available. 

Ok, at least it grows on export/import, so I don't need to create a new pool and copy everything over.

Thanks for the info!
Ben