Date: Wed, 1 Apr 2015 14:30:58 +0000 From: Dropbox <no-reply@dropboxmail.com> To: freebsd-stable@freebsd.org Subject: =?utf-8?q?Daniel_Kelles_invited_you_to_check_out_Dropbox?= Message-ID: <0000014c75646ecb-0a3e6c29-2feb-41ae-a483-ce9876cd2782-000000@us-west-2.amazonses.com>
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Hi there, Daniel Kelles wants you to try Dropbox! Dropbox lets you bring all your pho= tos, docs and videos with you anywhere and share them easily. Get started here. https://www.dropbox.com/l/s6jN8bqyJT9Q0CzL3huhhr?text=3D1 Thanks! - The Dropbox Team ____________________________________________________ To stop receiving invites from Dropbox, please go to https://www.dropbox.co= m/l/19oo1DfxJGE4l8upN3sduj?text=3D1 Dropbox, Inc., PO Box 77767, San Francisco, CA 94107 From owner-freebsd-stable@FreeBSD.ORG Wed Apr 1 21:44:46 2015 Return-Path: <owner-freebsd-stable@FreeBSD.ORG> Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 12F948B2 for <freebsd-stable@freebsd.org>; Wed, 1 Apr 2015 21:44:46 +0000 (UTC) Received: from mail.netplex.net (mail.netplex.net [204.213.176.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.netplex.net", Issuer "RapidSSL SHA256 CA - G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CA74CE98 for <freebsd-stable@freebsd.org>; Wed, 1 Apr 2015 21:44:45 +0000 (UTC) Received: from sea.ntplx.net (sea.ntplx.net [204.213.176.11]) by mail.netplex.net (8.15.1/8.15.1/NETPLEX) with ESMTP id t31LifMk044485; Wed, 1 Apr 2015 17:44:43 -0400 X-Virus-Scanned: by AMaViS and Clam AntiVirus (mail.netplex.net) X-Greylist: Message whitelisted by DRAC access database, not delayed by milter-greylist-4.4.3 (mail.netplex.net [204.213.176.9]); Wed, 01 Apr 2015 17:44:43 -0400 (EDT) Date: Wed, 1 Apr 2015 17:44:41 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> X-X-Sender: eischen@sea.ntplx.net Reply-To: Daniel Eischen <deischen@freebsd.org> To: Peter Wemm <peter@wemm.org> Subject: Re: Trying to clone a ZFS drive, can't get ashift=12 In-Reply-To: <2588497.o59NqK340E@overcee.wemm.org> Message-ID: <Pine.GSO.4.64.1504011658380.29498@sea.ntplx.net> References: <Pine.GSO.4.64.1504010016170.26089@sea.ntplx.net> <2588497.o59NqK340E@overcee.wemm.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/>; List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Wed, 01 Apr 2015 21:44:46 -0000 On Tue, 31 Mar 2015, Peter Wemm wrote: > On Wednesday, April 01, 2015 12:30:46 AM Daniel Eischen wrote: >> I have an Oracle (nee Sun) X4-2 server with identical 300GB SAS >> drives. I did an MBR ZFS install from FreeBSD 10.1-RELEASE CD >> and have it updated to p6: > [..] >> # zpool create -o cachefile=/tmp/newpool.cache bootpoolNew label/boot0 >> # zdb -U /tmp/newpool.cache | grep ashift >> ashift: 9 >> >> What gives? How do I get it to use 4k? > > Before creating the pool, try: > # sysctl vfs.zfs.min_auto_ashift=12 Thanks, and to Dmitri also. This seemed to do the trick. It is interesting that the default in the 10.1-RELEASE CD doesn't match the actual OS that is installed. > But watch your alignment of the MBR slices/partitions. I think you'll find it > easier to manage with gpt for a data disk, eg: > > # gpart create -s gpt da1 > # gpart add -t freebsd-zfs -a 4k da1 > combine that with the sysctl above you should have everything on 4k. > > Setting -a just sets the rounding for the start/end sectors, it doesn't affect > zfs when its sizing the sector size internally. > > btw; for a 300G drive you might not want 4k - this changes the base allocation > size to be 8 times larger. You might find your space efficiency less than ideal > if you have a lot of tiny files. The server is a web server and poudriere package builder, with some postgres and mysql databases as backends for the web services. We don't anticipate user data or home/project directories. My first ZFS install was Solaris 11, which recommended (mandated?) that rpool be from a slice not an entire disk, and boot from an SMI (VTOC) disk. So I followed the same convention when installing FreeBSD. -- DE
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