From owner-freebsd-stable@FreeBSD.ORG Mon Jan 3 15:08:46 2011 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 34CF3106564A for ; Mon, 3 Jan 2011 15:08:46 +0000 (UTC) (envelope-from ml@my.gd) Received: from mail-wy0-f182.google.com (mail-wy0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id C92968FC0C for ; Mon, 3 Jan 2011 15:08:43 +0000 (UTC) Received: by wyf19 with SMTP id 19so13349142wyf.13 for ; Mon, 03 Jan 2011 07:08:43 -0800 (PST) Received: by 10.227.24.73 with SMTP id u9mr11816623wbb.168.1294067323030; Mon, 03 Jan 2011 07:08:43 -0800 (PST) Received: from dfleuriot.local ([83.167.62.196]) by mx.google.com with ESMTPS id m10sm14208056wbc.16.2011.01.03.07.08.42 (version=SSLv3 cipher=RC4-MD5); Mon, 03 Jan 2011 07:08:42 -0800 (PST) Message-ID: <4D21E679.80002@my.gd> Date: Mon, 03 Jan 2011 16:08:41 +0100 From: Damien Fleuriot User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <4D1C6F90.3080206@my.gd> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: ZFS - moving from a zraid1 to zraid2 pool with 1.5tb disks 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, 03 Jan 2011 15:08:46 -0000 On 1/3/11 2:17 PM, Ivan Voras wrote: > On 12/30/10 12:40, Damien Fleuriot wrote: > >> I am concerned that in the event a drive fails, I won't be able to >> repair the disks in time before another actually fails. > > An old trick to avoid that is to buy drives from different series or > manufacturers (the theory is that identical drives tend to fail at the > same time), but this may not be applicable if you have 5 drives in a > volume :) Still, you can try playing with RAIDZ levels and probabilities. > That's sound advice, although one also hears that they should get devices from the same vendor for maximum compatibility -.- Ah well, next time ;) A piece of advice I shall heed though is using 1% less capacity than what the disks really provide, in case one day I have to swap a drive and its replacement is a few kbytes smaller (thus preventing a rebuild).