From owner-freebsd-stable@FreeBSD.ORG Wed Mar 6 00:56:17 2013 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 64E5AFE8 for ; Wed, 6 Mar 2013 00:56:17 +0000 (UTC) (envelope-from mauzo@anubis.morrow.me.uk) Received: from isis.morrow.me.uk (isis.morrow.me.uk [204.109.63.142]) by mx1.freebsd.org (Postfix) with ESMTP id 42D6A7DD for ; Wed, 6 Mar 2013 00:56:16 +0000 (UTC) Received: from anubis.morrow.me.uk (host86-177-98-144.range86-177.btcentralplus.com [86.177.98.144]) (Authenticated sender: mauzo) by isis.morrow.me.uk (Postfix) with ESMTPSA id D5F87450D5 for ; Wed, 6 Mar 2013 00:56:15 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.7.4 isis.morrow.me.uk D5F87450D5 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=morrow.me.uk; s=dkim201101; t=1362531376; bh=pyAacx+B1QQpvze9CuUqgkKUoMRFQskh4IpWPtovAOU=; h=Date:From:To:Subject:References:In-Reply-To; b=RJ8yiuX3yeP4XsR8TtNvI0aJmUkn/xxATmYZcW+2xSCGuDmZxdaSBH9D4mh2oL1L7 WXoSR7stq3v0MDuNkzueC+fcAoGS+bfEfrU8IhKmyiQO8qCdZ5ZDyi3gT307D9zgu+ PdKdEjpkmthWMhJEx8GArXkrMAYD2stNdNBKSVcE= X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.97.6 at isis.morrow.me.uk Received: by anubis.morrow.me.uk (Postfix, from userid 5001) id 1E9F89542; Wed, 6 Mar 2013 00:56:12 +0000 (GMT) Date: Wed, 6 Mar 2013 00:56:12 +0000 From: Ben Morrow To: freebsd-stable@freebsd.org Subject: Re: ZFS "stalls" -- and maybe we should be talking about defaults? Message-ID: <20130306005607.GA61190@anubis.morrow.me.uk> References: <513524B2.6020600@denninger.net> <89680320E0FA4C0A99D522EA2037CE6E@multiplay.co.uk> <20130305050539.GA52821@anubis.morrow.me.uk> <20130305053249.GA38107@icarus.home.lan> <5135D275.3050500@FreeBSD.org> <20130305220936.GA54718@icarus.home.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <404FB08ACE6E47318A468ABFCE335FA8@multiplay.co.uk> X-Newsgroups: gmane.os.freebsd.stable Organization: morrow.me.uk User-Agent: Mutt/1.5.21 (2010-09-15) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Mar 2013 00:56:17 -0000 Quoth "Steven Hartland" : > ----- Original Message ----- > From: "Daniel Kalchev" > > On Mar 6, 2013, at 12:09 AM, Jeremy Chadwick wrote: > > > >> I say that knowing lots of people use ZFS-on-root, which is great -- I > >> just wonder how many of them have tested all the crazy scenarios and > >> then tried to boot from things. > > > > I have verified that ZFS-on-root works reliably in all of the following > > scenarios: single disk, one mirror vdev, many mirror vdevs, raidz. > > Haven't found the time to test many raidz vdevs, I admit. :) > > One thing to watch out for is the available BIOS boot disks. If you try > to do a large RAIDZ with lots of disk as you root pool your likely to > run into problems not because of any ZFS issue but simply because the > disks the BIOS sees and hence tries to boot may not be what you expect. IIRC the Sun documentation recommends keeping the root pool separate from the data pools in any case. Ben