cvs commit: src/sys/amd64/conf GENERIC src/sys/i386/conf GENERIC src/sys/ia64/conf GENERIC src/sys/pc98/conf GENERIC src/sys/powerpc/conf GENERIC src/sys/sparc64/conf GENERIC src/sys/sun4v/conf GENERIC

Brooks Davis brooks at
Mon Feb 26 17:21:33 UTC 2007

On Sun, Feb 25, 2007 at 03:54:17PM +0100, Dag-Erling Sm?rgrav wrote:
> Brooks Davis <brooks at> writes:
> >   Log:
> >   Include GEOM_LABEL in GENERIC.  It's very useful and not well publicized
> >   enough.
> Bad idea.  GEOM_LABEL can lead to filesystem corruption when used in
> conjunction with mirrored disks.  You mount /dev/ufs/root thinking it
> corresponds to /dev/ar0s1a, when in fact it corresponds to /dev/ad0s1a
> (in most cases, if ad0 is a component of RAID 1 array ar0, ad0s1a will
> be tasted before ar0s1a, and GEOM_LABEL does not handle multiple
> identically labeled providers gracefully).

While I agree there are serious problems with glabel and software RAID1
configurations, I don't think that warrants continuing to hide it from
the rest of us.  We should probably add more warnings to the appropriate
manpages and fix the RAID implementations.

-- Brooks
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