zfs discuss - Feb 2011 - Replace block devices to increase pool size

Hi!

I have a zpool biult up from two vdrives (one mirror and one raidz). The
raidz is built up from 4x1TB HDs. When I successively replace each 1TB
drive with a 2TB drive will the capacity of the raidz double after the
last block device is replaced?

Achim


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 299 bytes
Desc: OpenPGP digital signature
URL:
<http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20110206/8b35a3b5/attachment.bin>

If autoexpand = on, then yes.
zpool get autoexpand <pool>
zpool set autoexpand=on <pool>

The expansion is vdev specific, so if you replaced the mirror first,
you''d
get that much (the extra 2TB) without touching the raidz.

Cheers,

On 7 February 2011 01:41, Achim Wolpers <achimwo7 at googlemail.com>
wrote:
> Hi!
>
> I have a zpool biult up from two vdrives (one mirror and one raidz). The
> raidz is built up from 4x1TB HDs. When I successively replace each 1TB
> drive with a 2TB drive will the capacity of the raidz double after the
> last block device is replaced?
>
> Achim
>
>
>
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20110207/62735bc4/attachment.html>

On Sun, February 6, 2011 08:41, Achim Wolpers wrote:
> I have a zpool biult up from two vdrives (one mirror and one raidz). The
> raidz is built up from 4x1TB HDs. When I successively replace each 1TB
> drive with a 2TB drive will the capacity of the raidz double after the
> last block device is replaced?
You may have to manually set property autoexpand=on; I found yesterday
that I had to (in my case on a mirror that I was upgrading).  Probably
depends on what version you created things at and/or what version
you''re
running now.

I replaced the drives in one of the three mirror vdevs in my main pool
over this last weekend, and it all went quite smoothly, but I did have to
turn on autoexpand at the end of the process to see the new space.
-- 
David Dyer-Bennet, dd-b at dd-b.net; http://dd-b.net/
Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/
Photos: http://dd-b.net/photography/gallery/
Dragaera: http://dragaera.info

> > I have a zpool biult up from two vdrives (one mirror and one raidz).
> > The
> > raidz is built up from 4x1TB HDs. When I successively replace each
> > 1TB
> > drive with a 2TB drive will the capacity of the raidz double after
> > the
> > last block device is replaced?
> 
> You may have to manually set property autoexpand=on; I found yesterday
> that I had to (in my case on a mirror that I was upgrading). Probably
> depends on what version you created things at and/or what version
> you''re
> running now.
> 
> I replaced the drives in one of the three mirror vdevs in my main pool
> over this last weekend, and it all went quite smoothly, but I did have
> to
> turn on autoexpand at the end of the process to see the new space.
autoexpand is by default off. I guess this is in case someone do something as
replacing two 500GB drives with two 1TB drives and then wants to replace those
with new 500GB drives, since setting autoexpand=on is quite simple and for the
expansion, irreversible. If you have expanded a VDEV, the only way to shrink it
is to backup, reconfigure ZFS and restore.

Vennlige hilsener / Best regards

roy
--
Roy Sigurd Karlsbakk
(+47) 97542685
roy at karlsbakk.net
http://blogg.karlsbakk.net/
--
I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er
et element?rt imperativ for alle pedagoger ? unng? eksessiv anvendelse av
idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og
relevante synonymer p? norsk.