[CentOS] Resizing a PV that belongs within a Volume Group?

Clint Dilks clintd at scms.waikato.ac.nz
Thu Feb 18 21:23:21 UTC 2010

On 19/02/10 10:11, Eric B. wrote:
> Hi,
> I was wondering if there was a way to extend (ie: grow) a PV that is part of
> a Volume Group?  I currently have a partition on my HD that is being used as
> a PV for my Volume Group, but would like to make it larger.  I have the
> space on my drive to extend my partition, but using standard tools (ex:
> gparted, Partition Magic, etc) would likely end up corrupting the data on in
> the Logical Volumes that are housed within the VG.
> I realize that I could just create a new partition on my HD and just add it
> to my Volume Group and extend my Volume Group, however, given that it would
> be two contiguous partitions on the HD, I was just wondering if there was a
> way of resizing the original partition within the VG without causing any
> problems.
> I tried looking at tools like pvresize but I can't seem to understand the
> right arguments to use it as whatever I try never seems to resize the
> original partition itself.  I also looked at system-config-lvm GUI tool, but
> that doesn't seem to allow me to make the PV any larger.
> Does anyone have any suggestions?
> Thanks!
> Eric
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Hi I remember having done this once recently on a test system.  And I 
strongly suggest you don't attempt unless you have a good backup.  You 
use the standard tools to resize the partition and then pvresize to see 
the new size of the PV.  Once you can see that the new size of the PV is 
recognised by the VG you can allocate the space.

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