[linux-lvm] how to extend an lvm partition?

[linux-lvm] how to extend an lvm partition?

[C'est Pierre]

Hello,

I just got curious, if I migrate the data from a lun to another one
which is bigger, with poor man's ghost such as 'dd if=sda of=sdb', how
am I going to be able to extend the lvm partition afterwards? is this
possible? I know I could add a new partition in the remaining space,
pvcreate/vgextend it into the existing VG, but are there other
alternatives?

Thanks

Re: [linux-lvm] how to extend an lvm partition?

[Bryn M. Reeves]

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C'est Pierre wrote:
> Hello,
> 
> I just got curious, if I migrate the data from a lun to another one
> which is bigger, with poor man's ghost such as 'dd if=sda of=sdb', how
> am I going to be able to extend the lvm partition afterwards? is this
> possible? I know I could add a new partition in the remaining space,
> pvcreate/vgextend it into the existing VG, but are there other
> alternatives?
> 
> Thanks
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Hi,

If your version of the LVM2 tools is recent enough you can use the
pvresize command to achieve this. It normally takes one argument - the
physical volume path to resize:

[root ~]# pvresize /dev/loop0
  Physical volume "/dev/loop0" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized

This was added in CVS around a year ago - I think it should have made it
into releases from 2.02.00.

Without pvresize support, the easiest way to use the extra space is, as
you said, to partition it as an additional PV.

Regards,
Bryn.
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Re: [linux-lvm] how to extend an lvm partition?

[C'est Pierre]

OK Bryn,

I completly forgot to check for a pvextend/resize... my bad! I do have
those tools.

Thanks!
Pierre

On 11/24/06, Bryn M. Reeves <breeves@redhat.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> C'est Pierre wrote:
> > Hello,
> >
> > I just got curious, if I migrate the data from a lun to another one
> > which is bigger, with poor man's ghost such as 'dd if=sda of=sdb', how
> > am I going to be able to extend the lvm partition afterwards? is this
> > possible? I know I could add a new partition in the remaining space,
> > pvcreate/vgextend it into the existing VG, but are there other
> > alternatives?
> >
> > Thanks
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm@redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
> Hi,
>
> If your version of the LVM2 tools is recent enough you can use the
> pvresize command to achieve this. It normally takes one argument - the
> physical volume path to resize:
>
> [root ~]# pvresize /dev/loop0
>   Physical volume "/dev/loop0" changed
>   1 physical volume(s) resized / 0 physical volume(s) not resized
>
> This was added in CVS around a year ago - I think it should have made it
> into releases from 2.02.00.
>
> Without pvresize support, the easiest way to use the extra space is, as
> you said, to partition it as an additional PV.
>
> Regards,
> Bryn.
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> Version: GnuPG v1.4.5 (GNU/Linux)
> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
>
> iD8DBQFFZrvn6YSQoMYUY94RAjjPAKDCUlGMBkCG3ShhIy48cUwPYuSDLQCfeOVI
> ck5kC0LzecYyAZDBHd1Kgaw=
> =K3/+
> -----END PGP SIGNATURE-----
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>