[Gllug] Mapping from disk block to LVM partitions

[Richard Jones]

On Mon, Dec 07, 2009 at 11:33:09AM +0000, Rich Walker wrote:
> Kostas Georgiou <k.georgiou at imperial.ac.uk> wrote:
> 
> > 
> > What about lvs -o +seg_pe_ranges or something like
> > pvs -o pv_name,lv_name,pvseg_start,pvseg_size
> > 
> 
> The lvs option is good; still got to get from the PE ranges to the physical
> blocks...

I'm a bit vague on this (it was well over a year ago that I looked at
this), but aren't physical extents just 32 MB blocks of the physical
disk, plus some small initial offset?

You're more than welcome to trawl through the code I wrote which
should answer this question.  All the files 'diskimage_lvm2*.ml*'
here:

http://git.annexia.org/?p=virt-df.git;a=tree;f=lib;hb=HEAD

Rich.

-- 
Richard Jones
Red Hat
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