From owner-freebsd-current@FreeBSD.ORG Mon Dec 19 18:17:40 2011 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 009221065675 for ; Mon, 19 Dec 2011 18:17:40 +0000 (UTC) (envelope-from se@freebsd.org) Received: from nm20.bullet.mail.ne1.yahoo.com (nm20.bullet.mail.ne1.yahoo.com [98.138.90.83]) by mx1.freebsd.org (Postfix) with SMTP id BAE618FC1A for ; Mon, 19 Dec 2011 18:17:39 +0000 (UTC) Received: from [98.138.90.48] by nm20.bullet.mail.ne1.yahoo.com with NNFMP; 19 Dec 2011 18:17:39 -0000 Received: from [98.138.226.62] by tm1.bullet.mail.ne1.yahoo.com with NNFMP; 19 Dec 2011 18:17:39 -0000 Received: from [127.0.0.1] by smtp213.mail.ne1.yahoo.com with NNFMP; 19 Dec 2011 18:17:39 -0000 X-Yahoo-Newman-Id: 108984.58477.bm@smtp213.mail.ne1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: lbaIyusVM1lzv9pVpzn0s2MMlFJkYIVNhsHbESsUr9.Wa6w 390PsksyF3lsf5twOkW0_8H8YlcNP5rwjBfeEXZgZ81KR.5.nS5fbNc.3yGV OGKpt8CAOab0cbfkG5aKuqbuOsKQhIrwgE.cP3kk9UQUc2vCcgWyV26mhQrW UPUuol2BwrvcyNoLrH4PSJcxum2Yd0jSGpBs8P6oOLF8ylOBnxqCqJnhrtvp efIXAt7PcY4hOVit09yli980d11E7Dpa4sUcqvf8fL.rETKMfe73vx.arWBO pPSN0aKkY9ZdjzQrGHTnmGORYaDIlMONXsvoQGrBagfMajwGWoCkWU15uzOn lXk97tSidAr_31O5ttwWLkZm32tfEmB8Q4OiLpnE1FETSXtyY1SDOyg0vbWo 94UJ1v473dzPiA9Q- X-Yahoo-SMTP: iDf2N9.swBDAhYEh7VHfpgq0lnq. Received: from [192.168.119.20] (se@81.173.146.234 with plain) by smtp213.mail.ne1.yahoo.com with SMTP; 19 Dec 2011 10:17:38 -0800 PST Message-ID: <4EEF7FC0.8030801@freebsd.org> Date: Mon, 19 Dec 2011 19:17:36 +0100 From: Stefan Esser User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: Olivier Smedts References: <4EEF488E.1030904@freebsd.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: FreeBSD Current Subject: Re: Uneven load on drives in ZFS RAIDZ1 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Dec 2011 18:17:40 -0000 Am 19.12.2011 15:36, schrieb Olivier Smedts: > 2011/12/19 Stefan Esser : >> So: Can anybody reproduce this distribution requests? > > Hello, > > Stupid question, but are your drives all exactly the same ? I noticed > "ashift: 12" so I think you should have at least one 4k-sector drive, > are you sure they're not mixed with 512B per sector drives ? All drives are identical: at scbus3 target 0 lun 0 (ada0,pass2) at scbus4 target 0 lun 0 (ada1,pass3) at scbus5 target 0 lun 0 (ada2,pass4) at scbus6 target 0 lun 0 (ada3,pass5) These are 4KB sector drives. Everything is correctly aligned and all drives have identical partition (created by a script that was run once for each drive, so there is no risk of typoes leading to differences). Regards, STefan