Re: how to unmount /var

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On Feb 17, 2008 11:24 AM, François Patte
<francois.patte@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
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> Le 17.02.2008 14:07, Stuart Sears a écrit :
> | François Patte wrote:
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> |> Bonjour,
> |>
> |> I have done some mistakes while partitioning my HD and /var is too small.
> |>
> |> Fortunately, I use lvm... unfortunately I have to unmount /var before
> |> resizing and so many apps use /var....
> |
> | why do you have to unmount it? If you are using LVM and ext2/3 you
> | should be able to do this online.
> |
> | lvextend -L +<SIZE> /dev/volgroupname/var_volume
>
> thanks for this info
> .
> |
> | resize2fs /dev/volgroupname/var_volume
>
> It seems that it is dangerous to use this:
>
> <lvm-howto>
> Unless you have patched your kernel with the ext2online patch it is
> necessary to unmount the file system before resizing it. (It seems that
> the online resizing patch is rather dangerous, so use at your own risk)
> </lvm-howto>
>
> How can I be sure that fedora kernels are patched like this?
>
> - --
> François Patte
> UFR de mathématiques et informatique
> Université Paris Descartes
> 45, rue des Saints Pères
> F-75270 Paris Cedex 06
> Tél. +33 (0)1 44 55 35 61
> http://www.math-info.univ-paris5.fr/~patte
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Have you considered booting from a live/recovery CD/DVD and resize it
from there?  In that case it's definitely unmounted so addresses your
concerns of possible risks doing it live.

Jacques B.


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