From owner-cvs-src@FreeBSD.ORG Tue Apr 8 07:16:50 2003 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4363E37B401; Tue, 8 Apr 2003 07:16:50 -0700 (PDT) Received: from mailout02.sul.t-online.com (mailout02.sul.t-online.com [194.25.134.17]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5858A43F75; Tue, 8 Apr 2003 07:16:49 -0700 (PDT) (envelope-from Alexander@Leidinger.net) Received: from fwd09.sul.t-online.de by mailout02.sul.t-online.com with smtp id 192tu0-0002jq-06; Tue, 08 Apr 2003 16:16:44 +0200 Received: from Andro-Beta.Leidinger.net (520065502893-0001@[80.131.125.201]) by fmrl09.sul.t-online.com with esmtp id 192tti-09sexsC; Tue, 8 Apr 2003 16:16:26 +0200 Received: from Magelan.Leidinger.net (Magelan [192.168.1.1]) h38EGSBR002212; Tue, 8 Apr 2003 16:16:28 +0200 (CEST) (envelope-from Alexander@Leidinger.net) Received: from Magelan.Leidinger.net (netchild@localhost [127.0.0.1]) by Magelan.Leidinger.net (8.12.9/8.12.9) with SMTP id h38EGZpr005312; Tue, 8 Apr 2003 16:16:35 +0200 (CEST) (envelope-from Alexander@Leidinger.net) Date: Tue, 8 Apr 2003 16:16:35 +0200 From: Alexander Leidinger To: Soeren Schmidt Message-Id: <20030408161635.12b7b0a5.Alexander@Leidinger.net> In-Reply-To: <200304081356.h38Du7PF032425@spider.deepcore.dk> References: <20030408153259.2a4b03ac.Alexander@Leidinger.net> <200304081356.h38Du7PF032425@spider.deepcore.dk> X-Mailer: Sylpheed version 0.8.9claws (GTK+ 1.2.10; i386-portbld-freebsd5.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Sender: 520065502893-0001@t-dialin.net cc: cvs-src@freebsd.org cc: src-committers@freebsd.org cc: sos@freebsd.org cc: cvs-all@freebsd.org cc: des@ofug.org Subject: Re: cvs commit: src/sys/dev/ata ata-all.c ata-all.h ata-chipset.cata-dma.c ata-pci.c ata-pci.h X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Apr 2003 14:16:50 -0000 On Tue, 8 Apr 2003 15:56:07 +0200 (CEST) Soeren Schmidt wrote: > > > > > Besides, enabling ATA tags automatically enables the write cache. > > > > > > > > This can be changed... > > > > > > No it cannot, requirement of the HW. > > > > Does this mean we can't use ATA-TQ in situations where we would use TQ > > without WC on a SCSI system (read: does it affect softupdates)? > > Well, this has newer been found out by hard evidence. The only vendor > doing tags capable ATA disks doesn't want to tell, so we cant really > know for sure. However tests here indicates that the "WC effect" is > not in action when tags are enabled, but I could just have been > unusually lucky... You should gamble then... ;-) Thanks, Alexander. -- It is easier to fix Unix than to live with NT. http://www.Leidinger.net Alexander @ Leidinger.net GPG fingerprint = C518 BC70 E67F 143F BE91 3365 79E2 9C60 B006 3FE7