From owner-freebsd-questions@FreeBSD.ORG Tue Nov 22 08:06:51 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DAB14106566C for ; Tue, 22 Nov 2011 08:06:51 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (unknown [IPv6:2001:8b0:151:1:3cd3:cd67:fafa:3d78]) by mx1.freebsd.org (Postfix) with ESMTP id 6C3A88FC0A for ; Tue, 22 Nov 2011 08:06:51 +0000 (UTC) Received: from seedling.black-earth.co.uk (seedling.black-earth.co.uk [81.187.76.163]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.5/8.14.5) with ESMTP id pAM86l0e011618 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Tue, 22 Nov 2011 08:06:48 GMT (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: OpenDKIM Filter v2.4.1 smtp.infracaninophile.co.uk pAM86l0e011618 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=infracaninophile.co.uk; s=201001-infracaninophile; t=1321949208; bh=ZojPHXhLUjjIsFdCJv1XwiFgCc2aW2jXHVQ9CCZKWTU=; h=Message-ID:Date:From:MIME-Version:To:Subject:References: In-Reply-To:Content-Type:Cc; b=E9B93OiqUg2S64ZsGgUr4X1d/rQFZ89Sgobd5WgDGaklgek9sQ+NRgR12cg/RTpPG LMLOLRdLR+MY9wjTLkNEsbkulkJhISp/EuocHhervgdGL/Ij+g+L3430O4I2G4gEeE 8Nk5RrpvR+SXX4DM1xTJXrScRshRW4wLW1KWjz3s= Message-ID: <4ECB580E.20203@infracaninophile.co.uk> Date: Tue, 22 Nov 2011 08:06:38 +0000 From: Matthew Seaman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <88f3d8e819b3420f8e61723bee90ba5e.squirrel@www.magehandbook.com> In-Reply-To: X-Enigmail-Version: 1.3.3 OpenPGP: id=60AE908C Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig3C342C355BE6B1AE500B784A" X-Virus-Scanned: clamav-milter 0.97.3 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-0.6 required=5.0 tests=BAYES_05,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,SPF_FAIL autolearn=no version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on lucid-nonsense.infracaninophile.co.uk Subject: Re: Setting up ZFS - Filesystem Properties and Installing on Root X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Nov 2011 08:06:52 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig3C342C355BE6B1AE500B784A Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 22/11/2011 02:09, APseudoUtopia wrote: > Another quick question about swap: If I have 4 drives, with 512MB > swap, the system uses all 4 swap partitions, correct? So it's not like > it'd be going to waste? I'd have a total of 2 GB swap? Well, yes. If you just declare those raw partitions to be swap areas, that will be the case. However, doing this is asking for trouble: you subvert any resilience features obtained by using ZFS with raidz1. If any one of the drives fails, your swap area will break and your system will probably crash. Better to set up two pairs of gmirrors for swap -- the procedure is described here: http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/Mirror in section3 "Finish Install." This will effectively give you a raid10 for your swap, with a total size of 1GB. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate JID: matthew@infracaninophile.co.uk Kent, CT11 9PW --------------enig3C342C355BE6B1AE500B784A Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk7LWBYACgkQ8Mjk52CukIxqKACfZaIQofP607cf2KI6wYWO4MwT 62QAnjk7FSNNbbUbavxPDvFuP0vAqsK6 =+dCQ -----END PGP SIGNATURE----- --------------enig3C342C355BE6B1AE500B784A--