cvs commit: src/sys/sys disk.h src/sys/geom geom_dev.c

Poul-Henning Kamp phk at
Sat May 5 18:08:04 UTC 2007

In message <200705051702.l45H2JhR047993 at>, 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 at 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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