Xen users - Aug 2011 - How to expand LVM without create new drive?

I now how to expand a LVM by creating a new drive as described here: 
http://lists.centos.org/pipermail/centos/2007-February/032664.html, the steps 
are:

# pvcreate /dev/sda3
# vgextend VolGroup00 /dev/sda3 

Now, I want to know how to expand a LVM without create /dev/sda3?

Suppose I have 2 GB free (unpartitioned) and LVM use /dev/sda2 (8 GB). How to 
make /dev/sda2 become 10 GB? Then resize LVM to 10 GB.

 Regards, Wendy


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Hi Wendy,

Have you tried lvextend command? Type "lvextend --help" to see how to
use this.

Remember that the LVM have 3 levels, physical volumes (PV), volume
groups (VG) and logical volumes (LV).

If you need rezise the partition, firstly you must resize or "extend"
the LV. After that, you should resize the filesystem of the partition
(ext3 filesystem supports live resizing).

Regards,

Diego

2011/8/31 Wendy William <kotakomputer@yahoo.com>:
> I now how to expand a LVM by creating a new drive as described here:
> http://lists.centos.org/pipermail/centos/2007-February/032664.html, the
steps
> are:
>
> # pvcreate /dev/sda3
> # vgextend VolGroup00 /dev/sda3
>
> Now, I want to know how to expand a LVM without create /dev/sda3?
>
> Suppose I have 2 GB free (unpartitioned) and LVM use /dev/sda2 (8 GB). How
to
> make /dev/sda2 become 10 GB? Then resize LVM to 10 GB.
>
>  Regards, Wendy
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
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On 8/31/11 6:15 PM, Wendy William wrote:
> I now how to expand a LVM by creating a new drive as described here: 
> http://lists.centos.org/pipermail/centos/2007-February/032664.html, the
steps
> are:
> 
Hi!
> # pvcreate /dev/sda3
> # vgextend VolGroup00 /dev/sda3 
> 
That would be the easy and painless way.
> Now, I want to know how to expand a LVM without create /dev/sda3?
> 
> Suppose I have 2 GB free (unpartitioned) and LVM use /dev/sda2 (8 GB). How
to
> make /dev/sda2 become 10 GB? Then resize LVM to 10 GB.
> 
Resizing a partition/pv (sda2 in your case) doesn''t really have to do
much (other than calling vgextend (?)) with lvm. What you need to do is
fire up your partitioning program (fdisk?), delete the partition and
recreate it with the same starting sector and set the last sector 2GB
further down the disk.
>  Regards, Wendy
hth, Mark

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