Date: Sun, 25 Jun 2006 14:14:03 -0400 From: Mike Jakubik <mikej@rogers.com> To: Matthew Seaman <m.seaman@infracaninophile.co.uk> Cc: =?ISO-8859-1?Q?V=E1clav_Haisman?= <V.Haisman@sh.cvut.cz>, freebsd-stable@freebsd.org Subject: Re: Setting up GEOM mirror Message-ID: <449ED26B.20706@rogers.com> In-Reply-To: <449ED0BF.90001@infracaninophile.co.uk> References: <449ECDD1.8070407@sh.cvut.cz> <449ED0BF.90001@infracaninophile.co.uk>
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Matthew Seaman wrote: > Václav Haisman wrote: > >> Hi, >> I want to set up GEOM mirror of whole existing partitioned 250G disk. >> The procedure described at <http://people.freebsd.org/~rse/mirror/>; >> seems to be rather long/complicated. I thought about using this: >> >> # Boot into single user, then... >> # First change fstab. >> cp -p /etc/fstab /etc/fstab.orig >> sed -e 's/dev\/ad0/dev\/mirror\/gm0/g' </etc/fstab.orig >/etc/fstab >> # Then create the mirror. >> gmirror label -v -b split -s 2048 mymirror ad0 >> gmirror insert -h mymirror ad2 >> # Reboot into the new World order. >> shutdown -r now >> >> Will this work or is it wrong? I appreciate any comment to this. >> > > http://www.onlamp.com/pub/a/bsd/2005/11/10/FreeBSD_Basics.html > The problem with these instructions is that they don't take in to account the last sector. You may very well end up writing the metadata on the file system.
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