Date: Wed, 27 Jun 2007 14:16:54 -0400 (EDT) From: tradigan@newrevolutions.net To: freebsd-questions@freebsd.org Subject: gmirror Message-ID: <46934.208.40.168.12.1182968214.squirrel@www.newrevolutions.net>
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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?
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