From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o6OMWQbH025581 for ; Sat, 24 Jul 2010 17:32:27 -0500 Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CF9D046F4D4 for ; Sat, 24 Jul 2010 15:35:28 -0700 (PDT) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id 0cQpmiRCAnjl58qj for ; Sat, 24 Jul 2010 15:35:28 -0700 (PDT) From: Michael Monnerie Subject: Re: 4k sector drives Date: Sun, 25 Jul 2010 00:35:21 +0200 References: <201007211333.48363.eye.of.the.8eholder@gmail.com> <20100724084751.GA32006@infradead.org> <4C4B55F7.2090501@sandeen.net> In-Reply-To: <4C4B55F7.2090501@sandeen.net> MIME-Version: 1.0 Message-Id: <201007250035.25946@zmi.at> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3085511271583519852==" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Cc: Christoph Hellwig , Eric Sandeen --===============3085511271583519852== Content-Type: multipart/signed; boundary="nextPart1832371.Z87ZipIt1g"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart1832371.Z87ZipIt1g Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On Samstag, 24. Juli 2010 Eric Sandeen wrote: > > If it really is one using -s size=3D4096 is the right thing to do. >=20 > Haven't read the whole thread so maybe this is redundant, but make > sure all partitions (if any) are 4k aligned as well (unless it has > the secret-handshake sector 63 offset...) =20 Thank you Christoph for clarification, also thanks to Eric - I've been=20 aligning all partitions to a multiple of 512 sectors since a long time,=20 which fits all stripe set sizes up to 256k. Too bad that even Linux=20 fdisk and parted still don't do something like that, today I setup a=20 Novell SLES 11 with XEN VM, and everywhere parted would align the first=20 partition (when using GPT) to sector 34.. what a number.. Good that 4K=20 sector drives arrive now, so the tools will hopefully change for a=20 better default. BTW: AFAIK SSD drives have a (sometimes very large) internal alignment=20 of bytes which should be used as a "stripe size" to meet the optimal I/O=20 size. Is there a way to find out how big that is yet? =2D-=20 mit freundlichen Gr=FCssen, Michael Monnerie, Ing. BSc it-management Internet Services http://proteger.at [gesprochen: Prot-e-schee] Tel: 0660 / 415 65 31 ****** Aktuelles Radiointerview! ****** http://www.it-podcast.at/aktuelle-sendung.html // Wir haben im Moment zwei H=E4user zu verkaufen: // http://zmi.at/langegg/ // http://zmi.at/haus2009/ --nextPart1832371.Z87ZipIt1g Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEABECAAYFAkxLaq0ACgkQzhSR9xwSCbSJhgCgsYvNMpqo3p5A+aoFROUo027A lc4AnjmhF0uJH4Fo5gn5FIwakNzSWzdH =6tU4 -----END PGP SIGNATURE----- --nextPart1832371.Z87ZipIt1g-- --===============3085511271583519852== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs --===============3085511271583519852==--