From owner-freebsd-current@FreeBSD.ORG Mon May 7 18:23:29 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6C5B016A407 for ; Mon, 7 May 2007 18:23:29 +0000 (UTC) (envelope-from tjoerg@yahoo.com) Received: from n7.bullet.re3.yahoo.com (n7.bullet.re3.yahoo.com [68.142.237.92]) by mx1.freebsd.org (Postfix) with SMTP id 1D8F813C45D for ; Mon, 7 May 2007 18:23:29 +0000 (UTC) (envelope-from tjoerg@yahoo.com) Received: from [68.142.237.89] by n7.bullet.re3.yahoo.com with NNFMP; 07 May 2007 18:23:28 -0000 Received: from [66.196.101.132] by t5.bullet.re3.yahoo.com with NNFMP; 07 May 2007 18:23:28 -0000 Received: from [127.0.0.1] by rrr3.mail.re1.yahoo.com with NNFMP; 07 May 2007 18:23:28 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 572463.75376.bm@rrr3.mail.re1.yahoo.com Received: (qmail 95349 invoked by uid 60001); 7 May 2007 18:23:18 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:MIME-Version:Content-Type:Message-ID; b=TiwI2KJuKxcFUNFvzye8UbgQ1QUjp0zOEPlEJX07otTAvUPUs5hi/x7NTvYf7p5HFQTjKeBq2lso8bG5Qm1WANgQRbZqGhhopZp/R+qM3qREYBPO8ZheM2wV3LmjMtLQtHnQHTsnPIj5NjrJ9kWWsEYhylD2xtTpibS0id//lp0=; X-YMail-OSG: wR__lcoVM1lAbtIwHZpD9ZnDRM53.8IfkyZfptgxwHu3CaFpL5wGuK9__9dCf8rOy0nhqepd4n4Z3od5l0D_xlpH4w-- Received: from [201.78.15.253] by web63709.mail.re1.yahoo.com via HTTP; Mon, 07 May 2007 11:23:18 PDT X-Mailer: YahooMailRC/478 YahooMailWebService/0.7.41.10 Date: Mon, 7 May 2007 11:23:18 -0700 (PDT) From: Joerg t To: Pawel Jakub Dawidek MIME-Version: 1.0 Content-Type: text/plain; charset=ascii Message-ID: <752873.95041.qm@web63709.mail.re1.yahoo.com> Cc: freebsd-current Subject: Re: zfs and disk write cache 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, 07 May 2007 18:23:29 -0000 thanks for clarifying, Pawel! ----- Original Message ---- From: Pawel Jakub Dawidek To: Joerg t Cc: freebsd-current Sent: Monday, May 7, 2007 2:04:34 PM Subject: Re: zfs and disk write cache On Mon, May 07, 2007 at 09:34:20AM -0700, Joerg t wrote: > Does zfs on FreeBSD also disables the disk write cache like on Solaris if we give only a slice of the disk ? No. On Solaris write cache is disabled by default AFAIK, because of UFS, so ZFS on Solaris doesn't turn on write cache when it is configured on a slice, because another slice may have UFS. On FreeBSD write cache is enabled by default, so ZFS bascially doesn't touch it. -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! ____________________________________________________________________________________ Don't get soaked. Take a quick peak at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather