[CentOS] Some basic LVM questions

Eduardo Grosclaude eduardo.grosclaude at gmail.com
Sun Nov 8 19:53:09 UTC 2009


On Sun, Nov 8, 2009 at 4:44 PM, Monte Milanuk <memilanuk at gmail.com> wrote:

> M. Hamzah Khan wrote:
> > With both drives in one big volume group, failure of one drive will
> > (most likely) cause both the OS and data to be lost.
> >
> There in lies some of my confusion with this subject; correct me if I'm
> wrong in my understanding here: with LVM, I can keep adding more drives
> to a 'pool' and expand the size of the 'volume' that the OS sees
> available to it... but if any drive in that volume fails, I'd probably
> lose everything stored in that volume?!?  Sounds like a somewhat risky
> business to me, unless you *really* needed a storage volume that big
> that you had to span multiple drives to do so.
>

You are right. LVM sort of factors out the disk reliability issue. That's
why you should consider to allow volumes that span across disks on RAIDed-1
disks only.


-- 
Eduardo Grosclaude
Universidad Nacional del Comahue
Neuquen, Argentina
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