From owner-freebsd-questions@FreeBSD.ORG Mon May 4 14:30:56 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F2002106564A for ; Mon, 4 May 2009 14:30:56 +0000 (UTC) (envelope-from j.mckeown@ru.ac.za) Received: from d.mail.ru.ac.za (d.mail.ru.ac.za [IPv6:2001:4200:1010::25:4]) by mx1.freebsd.org (Postfix) with ESMTP id 246898FC0A for ; Mon, 4 May 2009 14:30:56 +0000 (UTC) (envelope-from j.mckeown@ru.ac.za) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=ru-msa; d=ru.ac.za; h=Received:From:Organization:To:Subject:Date:User-Agent:References:In-Reply-To:X-Face:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id:X-Virus-Scanned:X-Authenticated-User; b=M9NIWo/drV1CxMhSLUitu8aF3FRq2PgLlW7QzZWE5Rgr0ohsvfaQO1cjV8jLcviby/X/Nzfkt02ywnoZbyHe7+Q+uM7a072XifCiTGKHLJ5edpnycaw4cevW/21hJWzv; Received: from vorkosigan.ru.ac.za ([2001:4200:1010:1058:219:d1ff:fe9f:a932]:51128) by d.mail.ru.ac.za with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69 (FreeBSD)) (envelope-from ) id 1M0zC2-0002Q7-43 for freebsd-questions@freebsd.org; Mon, 04 May 2009 16:30:54 +0200 From: Jonathan McKeown Organization: Rhodes University To: freebsd-questions@freebsd.org Date: Mon, 4 May 2009 16:30:53 +0200 User-Agent: KMail/1.9.10 References: <200905011707.n41H7M6b021540@dc.cis.okstate.edu> <200905041031.16748.j.mckeown@ru.ac.za> <20090504135914.GB84251@gizmo.acns.msu.edu> In-Reply-To: <20090504135914.GB84251@gizmo.acns.msu.edu> X-Face: $@VrUx^RHy/}yu]jKf/<4T%/d|F+$j-Ol2"2J$q+%OK1]&/G_S9(=?utf-8?q?HkaQ*=60!=3FYOK=3FY!=27M=60C=0A=09aP=5C9nVPF8Q=7DCilHH8l=3B=7E!4?= =?utf-8?q?2HK6=273lg4J=7Daz?=@1Dqqh:J]M^"YPn*2IWrZON$1+G?oX3@ =?utf-8?q?k=230=0A=0954XDRg=3DYn=5FF-etwot4U=24b?=dTS{i X-Virus-Scanned: d.mail.ru.ac.za (2001:4200:1010::25:4) X-Authenticated-User: s0900137 from vorkosigan.ru.ac.za (2001:4200:1010:1058:219:d1ff:fe9f:a932) using auth_plaintext Subject: Re: When a System Dies; Getting back in operation again. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 May 2009 14:30:57 -0000 On Monday 04 May 2009 15:59:14 Jerry McAllister wrote: > On Mon, May 04, 2009 at 10:31:16AM +0200, Jonathan McKeown wrote: > > > If you have kept the right information beforehand, you can actually > > restore your dumps onto ``bare metal'' without doing a partial install > > first, and with the same newfs settings for each partition as you > > originally had. You need to use bsdlabel and dumpfs -m and keep the > > output for rebuilding. The rest of this message is the details. > > If you have a specific reason to want your new filesystems' to have > identical superblock info, you can use dumpfs -m, but you don't need > to worry about all that. =A0 Just fdisk, bsdlabel and then let newfs > take its defaults. Which of your filesystems currently has softupdates disabled? You may not=20 care - but the point is that using dumpfs in the way I described will=20 preserve that information (along with all the other tuning options) for=20 people who do care. If you're restoring a complete machine from backup, the less you have to th= ink=20 about, the better. Knowing that my filesystems are going to be restored wit= h=20 whatever tuning options I was previously running with, without my having to= =20 try and remember, gives me peace of mind ahead of time. Jonathan