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Re: [linux-lvm] merge two lvms on same VG



Use vgcfgbackup then edit the backup, then restore the edited backup. You might have to create a test lv with similar geometry to see how the lv is represented in the config file.

On Sep 10, 2012 11:40 PM, "tariq wali" <ganaiwali gmail com> wrote:
thanks for the reply , but wouldn't that merge LV's from two different volume groups and for some weird requirement I wanted to merge LV's from the same VG , say 

merge /dev/vg0/data and /dev/vg0/data1 into a  merged volume without any data loss .

On Mon, Sep 10, 2012 at 4:02 PM, Fran Garcia <franchu garcia gmail com> wrote:
On Wed, Sep 5, 2012 at 1:16 PM, tariq wali <ganaiwali gmail com> wrote:
> Hi, I had a situation to combine two LVM's on the same VG , other than
> wiping the existing ones and recreating a new one is there a way to merge
> the two on same VG ?

vgmerge.  You need to have the source VG with all your LVs inactive
and the PE size must be the same in both VGs.


Basically this would be:

lvchange -a n /dev/vg02/lv01
lvchange -a n /dev/vg02/lv02
lvchange -a n /dev/vg02/lv03
...
vgmerge vg01 vg02
vgchange -ay


this would put all the LVs from vg02 into the vg01 VG.

HTH

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--
Tariq Wali.


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