zfs discuss - Jun 2011 - Question: adding a single drive to a mirrored zpool

Hello,
I have a zpool consisting of several mirrored vdevs. I was in the middle of
adding another mirrored vdev today, but found out one of the new drives is bad.
I will be receiving the replacement drive in a few days. In the mean time, I
need the additional storage on my zpool.

Is the command to add a single drive to a mirrored zpool:
zpool add -f tank drive1?

Does the -f command cause any issues?
I realize that there will be no redundancy on that drive for a few days, and I
can live with that as long as the rest of my zpool remains intact.

Thanks
-- 
This message posted from opensolaris.org

Alex,

alex stun wrote:
> Hello,
> I have a zpool consisting of several mirrored vdevs. I was in the middle of
> adding another mirrored vdev today, but found out one of the new drives is
> bad. I will be receiving the replacement drive in a few days. In the mean
> time, I need the additional storage on my zpool.
>
> Is the command to add a single drive to a mirrored zpool:
> zpool add -f tank drive1?
>
> Does the -f command cause any issues?
> I realize that there will be no redundancy on that drive for a few days,
and I
> can live with that as long as the rest of my zpool remains intact.
>
> Thanks
> --
> This message posted from opensolaris.org
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
>
This is exactly what you''ll need to do. Without the -f zpool will stop
and
warn you that you have a "mismatch" in reliability. So, to get the
space:

 zpool add -f <poolname> <single-disk>

Then later,

 zpool attach <poolname> <newdisk> <single-disk>

HTH

Craig


-- 
Craig Cory
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On Fri, Jun 24, 2011 at 2:25 PM, alex stun <alex at stundzia.com> wrote:
> I have a zpool consisting of several mirrored vdevs. I was in the middle of
> adding another mirrored vdev today, but found out one of the new drives is
> bad. I will be receiving the replacement drive in a few days. In the mean
> time, I need the additional storage on my zpool.
>
> Is the command to add a single drive to a mirrored zpool:
> zpool add -f tank drive1?
>
> Does the -f command cause any issues?
> I realize that there will be no redundancy on that drive for a few days,
> and I can live with that as long as the rest of my zpool remains intact.
>
Note:  you will have 0 redundancy on the ENTIRE POOL, not just that one
vdev.  If that non-redundant vdev dies, you lose the entire pool.

Are you willing to take that risk, if one of the new drives is already DoA?

-- 
Freddie Cash
fjwcash at gmail.com
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