Date: Mon, 7 Aug 2006 15:09:08 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Dag-Erling Sm?rgrav <des@des.no>, Dmitry Marakasov <amdmi3@mail.ru> Subject: Re: absolute vs. relative offsets in disklabel Message-ID: <200608071509.08923.jhb@freebsd.org> In-Reply-To: <20060806145954.GC907@hades.panopticon> References: <20060731203213.GA75233@hades.panopticon> <864pwtoorp.fsf@xps.des.no> <20060806145954.GC907@hades.panopticon>
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On Sunday 06 August 2006 10:59, Dmitry Marakasov wrote: > * Dag-Erling Sm?rgrav (des@des.no) wrote: > > > Recent `disklabel differences FreeBSD, DragonFly' thread gave me a > > > thought - why do we have absolute offsets in disklabel? > > We don't, AFAIK. Since the transition to GEOM, the offsets are > > relative to the start of the containing provider. > It has nothing to do with GEOM, it's ondisk format of disklabel. I've > confirmed, there are global offsets. Actually, the GEOM provider goes though some gymnastics to portray the offsets as relative to userland, but ondisk they are still stored as absolute to preserve compatiblity. -- John Baldwin
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