[linux-lvm] Removing PVs from Volume Groups which have allocated LVs

[Larry Dickson]

Hi all,

I ran onto a similar problem when trying to create a LV where the ramdisk PV
came FIRST. It wouldn't do it even though I ordered it first in the list. So
what I had to do was create a VG out of the first PV alone, and the LV on
it, and then keep adding PV to VG and extend the LV. That resulted in a
determinate ordering.

If the composite VG already exists, the only technique I know is to search
or even write characteristic data patterns in the LV and also in all the
PVs, thus determining offsets :-(

Larry Dickson
Cutting Edge Networked Storage

On 5/22/08, R Ramkumar <rramkumar at novell.com> wrote:
>
>
> Hi,
>
> I have a LVM setup where I have a VG with 3 PVs.. I have created 2 LVs from
> the VG which eventually has taken physical storage space from one or two of
> the PVs.. Now, when I want to shrink the VG, I need to know the unallocated
> PV so that I can remove from the VG..
>
> Is there anyway that I can find out which PV is unallocated and which PV to
> remove from the VG.. Please let me know your views..
>
> Thanks,
> Ram
>
>
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