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Subject: =?utf-8?Q?Re=3A_ZFS=3A_replace_all_disks_on_new=2C_larger_ones?=
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From: John Nielsen <lists@jnielsen.net>
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Date: Tue, 14 Apr 2015 12:13:40 -0600
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On Apr 14, 2015, at 12:05 PM, Lev Serebryakov <lev@freebsd.org> wrote:

> Say, I have ZFS pool consist of raidz vdev with 3x1TB disks. It is
> 2Tb effective storage space, right? Now I could remove 1 disk (as
> failed one) and replace it with new, 2TB HDD. After resilvering I
> could replace second 1TB HDD, and, then, third one. Now I have raidz
> vdev with 3x2TB disks. Will I have 4TB effective storage space in my =
poo
> l?
>=20
> I know, that it is impossible to add NEW disk to raidz, but here is
> replacement smaller disks with larger ones, one-by-one.
>=20
> The same question could be asked about mirror and raidz2/raidz3 :)

Yes, that is the recommended way to increase the capacity of an existing =
vdev and I have done that more than once. Once you have replaced all the =
devices and the vdev is finished resilvering, a =E2=80=9Czpool online -e =
=E2=80=A6=E2=80=9D will make the additional space available.

JN