Date: Sat, 05 May 2007 18:08:00 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/sys disk.h src/sys/geom geom_dev.c Message-ID: <1822.1178388480@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 05 May 2007 17:02:19 GMT." <200705051702.l45H2JhR047993@repoman.freebsd.org>
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In message <200705051702.l45H2JhR047993@repoman.freebsd.org>, Pawel Jakub Dawid
ek writes:
> First two are self-explanatory, but the last one might not be. Here are
> properties of provider's ident:
>
> - ident value should not be based on on-disk metadata; in other words
> copying whole data from one disk to another should not yield the same
> ident for the other disk,
> - there could be more than one provider with the same ident, but only if
> they point at exactly the same physical storage, this is the case for
> multipathing for example,
- If the provider cannot guarantee these two requirements, no
ident shall be offered.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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