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
brooks at FreeBSD.org
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 FreeBSD.org> 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.
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