From owner-freebsd-scsi Mon Oct 26 01:32:14 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA22007 for freebsd-scsi-outgoing; Mon, 26 Oct 1998 01:32:14 -0800 (PST) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from frmug.org (frmug-gw.frmug.org [193.56.58.252]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id BAA21992; Mon, 26 Oct 1998 01:32:04 -0800 (PST) (envelope-from roberto@keltia.freenix.fr) Received: (from uucp@localhost) by frmug.org (8.9.1/frmug-2.3/nospam) with UUCP id KAA23645; Mon, 26 Oct 1998 10:31:20 +0100 (CET) (envelope-from roberto@keltia.freenix.fr) Received: by keltia.freenix.fr (VMailer, from userid 101) id E94E51508; Mon, 26 Oct 1998 09:35:11 +0100 (CET) Date: Mon, 26 Oct 1998 09:35:11 +0100 From: Ollivier Robert To: freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG Subject: Re: filesystem safety and SCSI disk write caching Message-ID: <19981026093511.A14275@keltia.freenix.fr> Mail-Followup-To: freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG References: <199810230013.RAA19305@salsa.gv.tsc.tdk.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.94.4i In-Reply-To: <199810230013.RAA19305@salsa.gv.tsc.tdk.com>; from Don Lewis on Thu, Oct 22, 1998 at 05:13:09PM -0700 X-Operating-System: FreeBSD 3.0-BETA/ELF ctm#4731 AMD-K6 MMX @ 200 MHz Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org According to Don Lewis: > That's certainly not my experience. Once the initiate_write_filepage > and newdirrem panics were fixed, my system has been completely stable. I agree. All my three systems are more stable now and the two using the ahc driver are faster under CAM. I've not see that much difference for the ncr driver. > I think you are thinking of NFS write caching. An NFS server isn't > supposed to tell the NFS client that the write has completed until No, I really talking about the WCE bit. SAM is very clear about this kernel value for HP-UX. There are two configurable variables, one is "async" mode (apparently you either have it for all I/O or not at all) and write caching (WCE). -- Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.freenix.fr FreeBSD keltia.freenix.fr 3.0-BETA #4: Thu Oct 15 01:36:57 CEST 1998 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message