How to Configure LVM for the External HDD While Deploying the machines

Hi Everyone!!!

Im very new to this service, I have a doubt requesting to help me…
Currently i have installed the maas from the ppa stable in my local oracle virtual box and have created a machine with 3 HDD like this sizes

Here No 1 is my root volume ,2 and 3 is addition HDD
and have set the storage as LVM

when deploying the machines via maas console am getting pass status in commissioning and it detects the HDD correctly

After that i have deployed the centos7

on this machine Once i logged into that new machine the root volume has been changed LVM other additional drives are not like root




My Goal is if am Selecting the storage layout as LVM it will apply the changes for all other HDD too
How to do that?

Looking for your response…