taking lvm backup

[Tapas Mishra]

On Tue, Sep 28, 2010 at 11:11 AM, Clint Byrum <clint at ubuntu.com> wrote:
>
> These are just the symlinks to the device nodes. If you look in
> /dev/mapper, you'll see type "b" files nintendo-lvm1, nintendo-lvm2,
> etc.

Yes I saw this is there.

> These block devices have their size defined by LVM, which you can
> see in 'lvdisplay' from above as "LV Size".
Yes
> Do they have filesystems on them?
Yes
> For each one, try something like:
>
> mount /dev/nintendo/lvm4 /mnt -o ro
These filesystems are used to install Guest OSeS.
So the filesystems are active.
Do I need to shutdown the Operating Systems on these LVMs.
Each LVM holds one Guest OS.
It is a virtualization setup.

> If it has a filesystem on it, that should detect it, and mount it
> readonly, and you should be able to back up only what is *used* on
> the volume, not the whole thing. Then just use whatever your favorite
> backup method is.
Ok.Do I not need to know the type of filesystem in these cases.



-- 
Tapas