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Re: [linux-lvm] Misleading documentation



On Wed, Sep 20, 2006 at 07:41:45AM -0500, Les Mikesell wrote:
> On Wed, 2006-09-20 at 06:40, Heinz Mauelshagen wrote:
> 
> > > >This is my biggest beef with LVM - why doesn't *any* of the 
> > > >documentation point this out? There are very few good reasons to use LVM 
> > > >without RAID, and "ignorance" certainly isn't among them. I don't see 
> > > >any mention of RAID or disk failures in the manual pages or in the HOWTO.
> > > 
> > > Mirroring should be dealt with in LVM itself, by mapping more PEs on 
> > > physical seperate PVs to each LE. From the little information I've seen 
> > > about the new LVM mirroring, it seems that the mirrors are defined on LV 
> > > level instead of LE/PE. But after some JFGI sessions nothing really 
> > > enlightening has shown up.
> > 
> > LVM2 does mirror by grouping multiple (hidden) logical volumes
> > into a mirror set.
> 
> Where would I find example commands to add a mirror, check
> the mirroring status, break it, reuse the other half, etc.?

'man lvcreate' to start with.

> Is it possible to mirror a snapshot instead of the changing
> volume?

Not yet.

> 
> -- 
>   Les Mikesell
>     lesmikesell gmail com
> 

-- 

Regards,
Heinz    -- The LVM Guy --

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Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
Storage Development                               56242 Marienrachdorf
                                                  Germany
Mauelshagen RedHat com                            PHONE +49  171 7803392
                                                  FAX   +49 2626 924446
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