From owner-freebsd-questions@FreeBSD.ORG Wed Jun 27 18:16:52 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 1581616A41F for ; Wed, 27 Jun 2007 18:16:52 +0000 (UTC) (envelope-from tradigan@newrevolutions.net) Received: from newrevolutions.net (h-66-166-153-85.phlapafg.covad.net [66.166.153.85]) by mx1.freebsd.org (Postfix) with ESMTP id A509313C458 for ; Wed, 27 Jun 2007 18:16:51 +0000 (UTC) (envelope-from tradigan@newrevolutions.net) Received: (qmail 59878 invoked by uid 98); 27 Jun 2007 18:16:58 -0000 Received: from 66.166.153.85 by ns1.newrevolutions.net (envelope-from , uid 89) with qmail-scanner-1.25 (clamdscan: 0.88.4/1946. spamassassin: 3.1.5. Clear:RC:0(66.166.153.85):SA:0(?/?):. Processed in 3.118871 secs); 27 Jun 2007 18:16:58 -0000 X-Spam-Status: No, hits=? required=? X-Qmail-Scanner-Mail-From: tradigan@newrevolutions.net via ns1.newrevolutions.net X-Qmail-Scanner: 1.25 (Clear:RC:0(66.166.153.85):SA:0(?/?):. Processed in 3.118871 secs) Received: from unknown (HELO www.newrevolutions.net) (tradigan@newrevolutions.net@66.166.153.85) by newrevolutions.net with SMTP; 27 Jun 2007 18:16:54 -0000 Received: from 208.40.168.12 (SquirrelMail authenticated user tradigan@newrevolutions.net) by www.newrevolutions.net with HTTP; Wed, 27 Jun 2007 14:16:54 -0400 (EDT) Message-ID: <46934.208.40.168.12.1182968214.squirrel@www.newrevolutions.net> Date: Wed, 27 Jun 2007 14:16:54 -0400 (EDT) From: tradigan@newrevolutions.net To: freebsd-questions@freebsd.org User-Agent: SquirrelMail/1.4.10a MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Subject: gmirror 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: Wed, 27 Jun 2007 18:16:52 -0000 Quick question, I am configuring gmirror to mirror certain slices on my hard drives.. I want to mirror /dev/ad0s1 (700M) to another drive.. I am fine with configuring gmirror and getting it running but I am unsure of how I create the BSD slices with bsdlabel -e.. When I do a bsdlabel -e /dev/ad0s1 I get: # /dev/ad0s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 409600 0 4.2BSD 2048 16384 25608 c: 1429722 0 unused 0 0 # "raw" part, don't edit d: 1020122 409600 4.2BSD 2048 16384 63760 When I initially create the mirror on the backup disk, I run a bsdlabel -e /dev/mirror/gm0s1 and this is what it shows: # /dev/mirror/gm0s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 1429705 16 unused 0 0 c: 1429721 0 unused 0 0 # "raw" part, don't edit My initial instinct was to mirror the bsdlabel output from ad0s1 but with just the 16 offset for the 'a' slice coming out with: # /dev/mirror/gm0s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 409584 16 4.2BSD 2048 16384 25608 c: 1429721 0 unused 0 0 # "raw" part, don't edit d: 1020122 409584 4.2BSD 2048 16384 63760 Is my assumption correct? Or am I missing something here?