Date: Fri, 28 Nov 2008 18:35:14 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Andrew Falanga <af300wsm@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: gmirror and the UFS file systems Message-ID: <20081128183324.V5528@wojtek.tensor.gdynia.pl> In-Reply-To: <200811281008.19578.af300wsm@gmail.com> References: <200811281008.19578.af300wsm@gmail.com>
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> I'm getting ready to move forward on enabling gmirror on my churches website > server (FreeBSD 7.0-RELEASE p4). I used defaults during the install (most > importantly for this, the file system defaults). I've read in the manual > pages that the data for the mirror is contained in the last sector of the > drive/partitions. So, I want to mirror the entire drive (ad4) to the second > drive (ad5). This server doesn't yet have much data at all. I'm wondering > if I turn on this mirror, will anything important be overwritten in the last > sector? is your partition size multiply of fragment size without remainder? if not (quite a big chance) at least one sector at the end is unused and never be. so go on, but then fix disklabel, as c partition is 1 sector smaller. of course - boot from livecd to do this.
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