Date: Fri, 6 Mar 2009 07:25:38 -0800 (PST) From: Peter Steele <psteele@maxiscale.com> To: freebsd-hackers@freebsd.org Subject: Re: How to tear down a geom mirror? Message-ID: <27198392.361236353137467.JavaMail.HALO$@halo> In-Reply-To: <gordnd$ie4$1@ger.gmane.org>
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>Yes. The "clear" commands usually just zero-out the last sector of the >underlying provider (doesn't matter if it's a drive, slice or something >altogether different) so you don't have to do it manually. So, as a generic solution then I could just iterate through all slices of all drives and run "gmirror clear" on each, and run dd to clear the first sectors. What btw is in these first sectors? I use this command because I saw it being done in one of the gmirror tutorials. I understand what the gmirror clear command does, but what is the dd command clearing?
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