From owner-freebsd-current@FreeBSD.ORG Thu May 26 18:02:10 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8CB4216A41C for ; Thu, 26 May 2005 18:02:10 +0000 (GMT) (envelope-from bkoenig@cs.tu-berlin.de) Received: from mail.efacilitas.de (efacilitas.de [213.133.110.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2F23543D49 for ; Thu, 26 May 2005 18:02:10 +0000 (GMT) (envelope-from bkoenig@cs.tu-berlin.de) Received: from eurystheus.local (port-212-202-37-137.dynamic.qsc.de [212.202.37.137]) by mail.efacilitas.de (Postfix) with ESMTP id F251B123A33; Thu, 26 May 2005 20:00:44 +0200 (CEST) Received: from localhost (eurystheus.local [192.168.1.67]) by eurystheus.local (Postfix) with ESMTP id 00BEA12B09E; Thu, 26 May 2005 20:01:16 +0200 (CEST) Received: from eurystheus.local ([192.168.1.67]) by localhost (eurystheus.locaL [192.168.1.67]) (amavisd-new, port 10024) with ESMTP id 52092-09; Thu, 26 May 2005 20:01:12 +0200 (CEST) Received: from [192.168.1.67] (eurystheus.local [192.168.1.67]) by eurystheus.local (Postfix) with ESMTP id 14C8112B09A; Thu, 26 May 2005 20:01:12 +0200 (CEST) Message-ID: <42960EE7.30607@cs.tu-berlin.de> Date: Thu, 26 May 2005 20:01:11 +0200 From: Bjoern Koenig User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.8) Gecko/20050517 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Eric Anderson References: <4295D51F.50106@centtech.com> <429606D9.6080602@cs.tu-berlin.de> <42960ACB.7090801@cs.tu-berlin.de> <42960CFE.4060307@centtech.com> In-Reply-To: <42960CFE.4060307@centtech.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Virus-Scanned: amavisd-new at example.com Cc: FreeBSD Current Subject: Re: Disable read/write caching to disk? 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: Thu, 26 May 2005 18:02:10 -0000 Eric Anderson wrote: > Bjoern Koenig wrote: > > Thanks.. I've just read (quickly) both man pages. It seems as though > you are suggesting disabling the physical disk caching, which should not > make a difference in my case. The disk would report whatever it needs > to report to either host, and those should be in sync. Oh, I'm sorry. I have misunderstood you then. > When I mount the filesystem on host B ro, it shows me the filesystem as > of the time that I mounted it ro. Any subsequent changes on host A > (which has it mounted rw) are not seem on host B unless I unmount and > mount again on host B. This seems like a FreeBSD feature and not a > general scsi feature. By what mechanism do you mount the partitions remote? I'm not very experienced with this. I'm thinking of a typical network file system or GEOM gate. Björn