From owner-freebsd-stable@FreeBSD.ORG Mon Feb 27 11:07:43 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7FC7C1065673 for ; Mon, 27 Feb 2012 11:07:43 +0000 (UTC) (envelope-from wjw@digiware.nl) Received: from mail.digiware.nl (mail.ip6.digiware.nl [IPv6:2001:4cb8:1:106::2]) by mx1.freebsd.org (Postfix) with ESMTP id 1A0008FC1E for ; Mon, 27 Feb 2012 11:07:42 +0000 (UTC) Received: from rack1.digiware.nl (localhost.digiware.nl [127.0.0.1]) by mail.digiware.nl (Postfix) with ESMTP id 3D4D8153434; Mon, 27 Feb 2012 12:07:41 +0100 (CET) X-Virus-Scanned: amavisd-new at digiware.nl Received: from mail.digiware.nl ([127.0.0.1]) by rack1.digiware.nl (rack1.digiware.nl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UmNKdjiilC8S; Mon, 27 Feb 2012 12:07:40 +0100 (CET) Received: from [192.168.10.67] (opteron [192.168.10.67]) by mail.digiware.nl (Postfix) with ESMTP id BF3D0153433; Mon, 27 Feb 2012 12:07:40 +0100 (CET) Message-ID: <4F4B63F9.2030208@digiware.nl> Date: Mon, 27 Feb 2012 12:07:37 +0100 From: Willem Jan Withagen User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: Peter Maloney References: <4F4B0F83.4090600@norma.perm.ru> <4F4B3370.7020302@brockmann-consult.de> In-Reply-To: <4F4B3370.7020302@brockmann-consult.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: ZFS version upgrading..... X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Feb 2012 11:07:43 -0000 On 2012-02-27 8:40, Peter Maloney wrote: > And one word of advice: If you want to upgrade your pools to v28, I > think you should consider recreating your pools as v28 rather than > upgrading. There are some side effects to upgrading, such as logs that > can't be removed. Hi Peter, Although your advise is a sensible one.... It does not work if the ZFS system is full of data, and it's hard/impossible to rebuild. I have experience the other way around. My ZFS raidz2 is pretty old, probably even from the 7.x times... And I've upgraded it regulary to new versions. I even upgraded to v28, to be able to remove log's that we on USB sticks and all. No problem at all. And I do have removed logs quite a few times to look at different configs with my SSDs. Again: if you have te possibility to rebuild, why not. --WjW