From owner-freebsd-hackers@FreeBSD.ORG Sun Mar 21 10:45:21 2010 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1F1B71065676 for ; Sun, 21 Mar 2010 10:45:21 +0000 (UTC) (envelope-from olivier@gid0.org) Received: from mail-bw0-f228.google.com (mail-bw0-f228.google.com [209.85.218.228]) by mx1.freebsd.org (Postfix) with ESMTP id ABCA28FC1E for ; Sun, 21 Mar 2010 10:45:20 +0000 (UTC) Received: by bwz28 with SMTP id 28so4078779bwz.14 for ; Sun, 21 Mar 2010 03:45:19 -0700 (PDT) MIME-Version: 1.0 Received: by 10.204.3.216 with SMTP id 24mr2897013bko.30.1269168318953; Sun, 21 Mar 2010 03:45:18 -0700 (PDT) In-Reply-To: References: <86tysf58a2.fsf@ds4.des.no> <367b2c981003171112n785ea9d4q21d00b533819ca67@mail.gmail.com> <201003172023.o2HKNNbj069321@apollo.backplane.com> <201003172111.o2HLBIgJ069873@apollo.backplane.com> Date: Sun, 21 Mar 2010 11:45:18 +0100 Message-ID: <367b2c981003210345y4f8e661aib0b273c29ea00dbd@mail.gmail.com> From: Olivier Smedts To: Thiago Damas Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-hackers@freebsd.org Subject: Re: ATA 4K sector issues X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 21 Mar 2010 10:45:21 -0000 2010/3/17 Thiago Damas : > =A0I'll try tomorrow more zfs tests, with 1M alignment on begining of dis= k. > =A0But I also remember that zfs block size its 128k, but metadata can be = of > dynamic size. And we can use compressed files too. ZFS block size for data is not fixed at 128k, search for recordsize in the zfs man page. > =A0There is a sysctl, md_compress, that I turned out in my tests, but not > working as expected. > =A0Why using gnop -S 4096 works well? Interesting thread for issues with actual 4k disks : http://opensolaris.org/jive/thread.jspa?messageID=3D447926 I'm waiting for a jumper on those 4k disks to turn off the "legacy" 512b mo= de. > > Thiago > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org= " > --=20 Olivier Smedts _ ASCII ribbon campaign ( ) e-mail: olivier@gid0.org - against HTML email & vCards X www: http://www.gid0.org - against proprietary attachments / \ "Il y a seulement 10 sortes de gens dans le monde : ceux qui comprennent le binaire, et ceux qui ne le comprennent pas."