From owner-freebsd-current Mon Feb 16 06:11:39 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id GAA03922 for freebsd-current-outgoing; Mon, 16 Feb 1998 06:11:39 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from smtp03.primenet.com (smtp03.primenet.com [206.165.6.133]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id GAA03916 for ; Mon, 16 Feb 1998 06:11:36 -0800 (PST) (envelope-from tlambert@usr01.primenet.com) Received: (from daemon@localhost) by smtp03.primenet.com (8.8.8/8.8.8) id HAA14361; Mon, 16 Feb 1998 07:11:35 -0700 (MST) Received: from usr01.primenet.com(206.165.6.201) via SMTP by smtp03.primenet.com, id smtpd014349; Mon Feb 16 07:11:30 1998 Received: (from tlambert@localhost) by usr01.primenet.com (8.8.5/8.8.5) id HAA08937; Mon, 16 Feb 1998 07:11:18 -0700 (MST) From: Terry Lambert Message-Id: <199802161411.HAA08937@usr01.primenet.com> Subject: Re: Soft updates: OPTIONS Vs. TUNABLES, and a plan... To: tlambert@primenet.com (Terry Lambert) Date: Mon, 16 Feb 1998 14:11:18 +0000 (GMT) Cc: garbanzo@hooked.net, brian@worldcontrol.com, current@FreeBSD.ORG In-Reply-To: <199802152341.QAA08289@usr01.primenet.com> from "Terry Lambert" at Feb 15, 98 11:41:43 pm X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > Not doing the hack is problematic; one wonders how a root FS can ever > be tuned after the system has been booted. > > Mounting read-only is *not* sufficient. This is because there exist > read dependencies for read-before-write operations. You can probably > get away with it, but you are flying by the seat of your pants if > you do so. Ugh. OK, here are "seat-of-your-pants" instructions: 1) Boot single user, with root mounted read-only 2) Tunefs soft updates on 3) *immediately* run the "reboot" program. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message