From owner-freebsd-questions@FreeBSD.ORG Mon Aug 2 19:17:39 2010 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 0F7CF1065673 for ; Mon, 2 Aug 2010 19:17:39 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by mx1.freebsd.org (Postfix) with ESMTP id B52608FC12 for ; Mon, 2 Aug 2010 19:17:38 +0000 (UTC) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1Og0Vz-0000uS-1F for freebsd-questions@freebsd.org; Mon, 02 Aug 2010 21:17:35 +0200 Received: from 193.33.173.33 ([193.33.173.33]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 02 Aug 2010 21:17:35 +0200 Received: from c.kworr by 193.33.173.33 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 02 Aug 2010 21:17:35 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Volodymyr Kostyrko Date: Mon, 02 Aug 2010 22:17:25 +0300 Lines: 25 Message-ID: <4C5719C5.6050708@gmail.com> References: <1062436129.118171280776259114.JavaMail.root@mail-01.cse.ucsc.edu> <838366360.118191280776267912.JavaMail.root@mail-01.cse.ucsc.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 193.33.173.33 User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; uk-UA; rv:1.9.1.11) Gecko/20100722 Thunderbird/3.0.6 In-Reply-To: <838366360.118191280776267912.JavaMail.root@mail-01.cse.ucsc.edu> Subject: Re: Upgrading Boot Loader 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, 02 Aug 2010 19:17:39 -0000 02.08.2010 22:11, Tim Gustafson wrote: >> Nope. Read >> http://www.mail-archive.com/freebsd-stable@freebsd.org/msg103917.html >> You need the dd sequence. And you need to do that on exported pool. > > So, just to be clear, I need to boot off a USB key (which will then allow me to write to ad8 and ad10, my two boot zpool devices), and then: > > dd if=/boot/zfsboot of=/dev/ad8 bs=512 count=1 > dd if=/boot/zfsboot of=/dev/ad10 bs=512 count=1 > dd if=/boot/zfsboot of=/dev/ad8 bs=512 skip=1 seek=1024 > dd if=/boot/zfsboot of=/dev/ad10 bs=512 skip=1 seek=1024 > > And that assumes that I copy the newly-compiled zfsboot to the USB key after creating it, correct? Yes. PS: I've just recently changed my mind and moved from dedicated vdevs to gpart. This gives possibility of: 1. Having raw swap partition suitable for swapping/dumping. 2. Updating bootcode online without loosing uptime. Just in expense of some kilobytes of disk space. -- Sphinx of black quartz judge my vow.