From owner-freebsd-current@FreeBSD.ORG Mon May 7 17:05:13 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 9405C16A409 for ; Mon, 7 May 2007 17:05:13 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: from mail.garage.freebsd.pl (arm132.internetdsl.tpnet.pl [83.17.198.132]) by mx1.freebsd.org (Postfix) with ESMTP id 2EF9813C4C1 for ; Mon, 7 May 2007 17:05:12 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id BCF8B45684; Mon, 7 May 2007 19:05:10 +0200 (CEST) Received: from localhost (154.81.datacomsa.pl [195.34.81.154]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.garage.freebsd.pl (Postfix) with ESMTP id 18BC2487F0; Mon, 7 May 2007 19:05:05 +0200 (CEST) Date: Mon, 7 May 2007 19:04:34 +0200 From: Pawel Jakub Dawidek To: Joerg t Message-ID: <20070507170433.GA10442@garage.freebsd.pl> References: <852892.32081.qm@web63709.mail.re1.yahoo.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+HP7ph2BbKc20aGI" Content-Disposition: inline In-Reply-To: <852892.32081.qm@web63709.mail.re1.yahoo.com> X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 User-Agent: mutt-ng/devel-r804 (FreeBSD) X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on mail.garage.freebsd.pl X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=BAYES_00 autolearn=ham version=3.0.4 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 17:05:13 -0000 --+HP7ph2BbKc20aGI Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --+HP7ph2BbKc20aGI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGP1whForvXbEpPzQRAlG9AJ4o60D8+0kDMtCNtayOhT7hSlZyuQCg6mfh MDNWOwi915XlEPaq+n1V57Q= =ThxI -----END PGP SIGNATURE----- --+HP7ph2BbKc20aGI--