From owner-freebsd-ports@FreeBSD.ORG Mon Nov 7 13:56:58 2005 Return-Path: X-Original-To: freebsd-ports@freebsd.org Delivered-To: freebsd-ports@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AA62916A41F; Mon, 7 Nov 2005 13:56:58 +0000 (GMT) (envelope-from Alexander@Leidinger.net) Received: from www.ebusiness-leidinger.de (jojo.ms-net.de [84.16.236.246]) by mx1.FreeBSD.org (Postfix) with ESMTP id E64A443D48; Mon, 7 Nov 2005 13:56:57 +0000 (GMT) (envelope-from Alexander@Leidinger.net) Received: from Andro-Beta.Leidinger.net (p54A5FA2E.dip.t-dialin.net [84.165.250.46]) (authenticated bits=0) by www.ebusiness-leidinger.de (8.13.1/8.13.1) with ESMTP id jA7DYoNY064862; Mon, 7 Nov 2005 14:34:53 +0100 (CET) (envelope-from Alexander@Leidinger.net) Received: from localhost (localhost [127.0.0.1]) by Andro-Beta.Leidinger.net (8.13.3/8.13.3) with ESMTP id jA7DujRO090706; Mon, 7 Nov 2005 14:56:45 +0100 (CET) (envelope-from Alexander@Leidinger.net) Received: from pslux.cec.eu.int (pslux.cec.eu.int [158.169.9.14]) by netchild.homeip.net (Horde MIME library) with HTTP; Mon, 07 Nov 2005 14:56:45 +0100 Message-ID: <20051107145645.rav7hhtlsggk4sss@netchild.homeip.net> X-Priority: 3 (Normal) Date: Mon, 07 Nov 2005 14:56:45 +0100 From: Alexander Leidinger To: Ion-Mihai Tetcu References: <20051106.131413.122956532.yasu@utahime.org> <1131176568.3960.20.camel@shumai.marcuscom.com> <20051106.131413.122956532.yasu@utahime.org> <20051107111800.e199ndcxa8s0c444@netchild.homeip.net> <20051107122458.27a1f9e7@it.buh.tecnik93.com> In-Reply-To: <20051107122458.27a1f9e7@it.buh.tecnik93.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format="flowed" Content-Disposition: inline Content-Transfer-Encoding: 7bit User-Agent: Internet Messaging Program (IMP) H3 (4.0.3) / FreeBSD-4.11 X-Virus-Scanned: by amavisd-new Cc: freebsd-ports@freebsd.org, le@freebsd.org Subject: Re: vinum, 5.x performance, ... (was: Re: ANNOUNCE: GNOME 2.12.1 has been merged into the ports tree) X-BeenThere: freebsd-ports@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting software to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Nov 2005 13:56:58 -0000 Ion-Mihai Tetcu wrote: > On Mon, 07 Nov 2005 11:18:00 +0100 > Alexander Leidinger wrote: > >> > - and performaces is a nightmare on atapi harddisks >> >> AFAIR 4.x enables the write cache (bad if there's a power failure in >> the soft-updates case, since without native command queueing the >> drivers may reorder writes witout the possibility to notify >> soft-updates about it), > > So on NCQ disks write_caching should be safe from consistency > point-of-view ? AFAIK: Enabling the write cache doesn't mean you use NCQ. So just because your drive is able to do NCQ, you shouldn't enable the write cache. If your controller, your disk and the OS is able to use NCQ, and you enable the use of NCQ, then everything is fine... assuming the drive doesn't lie to you. AFAIR there are or there where some drives which lie(d), but I don't remember the details. Bye, Alexander. -- http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137 If your parents don't have kids, neither will you.