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Date:      Thu, 23 May 2013 09:13:39 -0400
From:      Paul Kraus <paul@kraus-haus.org>
To:        Albert Shih <Albert.Shih@obspm.fr>
Cc:        Liste FreeBSD <freebsd-questions@freebsd.org>
Subject:   Re: ZFS install on a partition
Message-ID:  <B95FA749-1979-4ACF-9107-CE3E6CFA476A@kraus-haus.org>
In-Reply-To: <20130523085333.GC1426@pcjas.obspm.fr>
References:  <F744BBF1-D98C-47BF-9546-14D1A9CB3733@todoo.biz> <5FB78660-EDA4-40DB-8A0D-B0DE23A0FB6C@kraus-haus.org> <20130523085333.GC1426@pcjas.obspm.fr>

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On May 23, 2013, at 4:53 AM, Albert Shih <Albert.Shih@obspm.fr> wrote:

> Have you ever try to update a ZFS Pool on 9.0 to 9.1 ?=20

I recently upgraded my home server from 9.0 to 9.1, actually, I did =
exported my data zpool (raidZ2), did a clean installation of 9.1, then =
imported my data zpool. Everything went perfectly. zpool upgrade did NOT =
indicate that there was a newer version of zpool so I did not even have =
to upgrade the on-disk zpool format (currently 28).

> I've a server with a big zpool in 9.0 I'm wonder if it's good idea to
> upgrade to 9.1. If I lost the data I'm  close to dead person. If I =
thinking
> to upgrade to 9.1 it's because I got small issue about NFSD, LACP.

My data zpool is not that big, only five 1TB drives in a raidZ2 for a =
net capacity of about 3TB, plus one 1TB hot spare.

My suggestion is to do the following (which is how I did the "upgrade"):

1) on a different physical system install 9.1, get the OS configured how =
you want it
2) on the production server, export the data zpool
3) shutdown the production server
4) remove the OS drives from the production server and replace with the =
drives you just installed 9.1 on
5) booth the production server with the 9.1 OS drives, make sure =
everything is working the way you want
6) import the data zpool

If the import fails, you can always put the 9.0 drives back in and get =
back up and running fairly quickly.

My system has the OS on a mirror zpool of two drives for just the OS.

--
Paul Kraus
Deputy Technical Director, LoneStarCon 3
Sound Coordinator, Schenectady Light Opera Company




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