RFC: Project geom-events

Lev Serebryakov lev at FreeBSD.org
Thu Oct 6 13:56:23 UTC 2011


Hello, Miroslav.
You wrote 6 октября 2011 г., 16:59:19:

> I am not a GEOM expert, but isn't it wrong concept, that glabel writes
> its metadata and publish original device size? If some GEOM write 
> metadata at last sector (or first), then it should shrink the published
> size (or offset). Or is the problem at geom_part, that it is writing 
> metadata past the advertised end of the device?
  Good point.

> e.g. If I have disk device with size of 100 sectors and glabel metadata
> is stored at the last sector, then glabel should shrink the advertised
> size to 99 sectors - then GPT secondary table will be at sector 99 
> instead of 100.

> The current state is simply wrong, because user can do something what
> cannot work and is not documented anywhere.
  It is Ok in UNIX way, in general. You should be able to shoot your
 leg, it is good :)

  But if geom_label doesn't reduce its provider to count its own
 metadata, it looks like a bug!

-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>



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