Date: Mon, 8 Jan 2007 19:14:37 -0500 From: Gary Palmer <gpalmer@freebsd.org> To: Fernan Aguero <fernan.aguero@gmail.com> Cc: geom@freebsd.org Subject: Re: clear metadata using dd? Message-ID: <20070109001437.GC97624@in-addr.com> In-Reply-To: <520894aa0701081445i43d76098m418ce695d2133e53@mail.gmail.com> References: <520894aa0701081445i43d76098m418ce695d2133e53@mail.gmail.com>
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On Mon, Jan 08, 2007 at 07:45:06PM -0300, Fernan Aguero wrote: > Hi > > I'm trying to set up two disks to contain both gmirrored and gstriped > slices. > > This is what I'm trying to achieve: > adxs1, swap > adxs2, gmirror > adxs3, gstripe > > I already got the first and second slices set up (swap and gmirror > containing > the active, root partition), but I cannot seem to be able to set up s3 into > a > gstripped device. > > gama# gstripe label -v gs0 /dev/ad4s3 /dev/ad6s3 > Can't store metadata on /dev/ad4s3: Operation not permitted. > > This might be because ad4s3 had been part of a gmirror device before I > reorganized my disks and moved the mirror to the s2 slice. > > Gayn Winters suggested that: > "The geom metadata is stored in the last block of the slice. Zero it as > well and you can have a clean start." > http://lists.freebsd.org/pipermail/freebsd-questions/2006-May/120950.html > > But now I wonder what is the magic incantation to run dd for targeting the > last > (sector?) of ad4s3? Any reason that "gstripe clear" or "gmirror clear" doesn't work? Thats what they're meant to do, as far as I know.
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