Okay, so let's try to understand how LVM is organized.
It all starts in the center with the volume group.
And this volume group, or VG, is really the heart of all your storage, the abstraction
of your storage.
Because of the volume group, you don't have to think about the different devices.
These devices, these are the physical volumes.
And you just put your physical volumes in the volume group.
It can be a disk, can be a partition, can really be any block device that you want.
And the nice thing about it is that here you have your flexibility for the storage.
You need more storage, you just add in a new physical volume.
At the top level, you are going to create the LVs out of here.
So LV1 and LV2 and LV3, these are your logical volumes.
And this is where you are going to do your MKFS, in which you are going to mount.
And the nice thing is that it's all about flexibility.
So you have a shortage of disk space right here.
Well, you just add a new PV to the volume group to get more disk space in the volume
group.
And then you're able to resize your logical volume.
And that's cool.
And that is why LVM is still used as a standard solution.