What is Logical Volume Manager (lvm) and it's steps?

 What is LVM?

Lvm is a way to manage the storage dynamically (flexible). There are many reasons why administrator like to use lvm.

1. Lvm offers flexible solution to manage the storage means if logical volume (lv) is run out of space you can check if volume group (vg) has space you can extend the logical volume (lv) using the vg, if vg doesn't has same you can check physical volume (pv), if it has you can extend  the vg taking space from pv, if pv doesn't has space you can add additional disks to add space in pv.

2. Lvm has option that you can replace failing hard disk without any downtime.

Below is lvm structure:

Before you can create a lvm you need to make a physical volume (pv) then volume group (vg) and them logical volume (lv).

What is physical volume (pv)?

Pv is space which are disks and you create a pv on them , from which you can create a lvm.

What is volume group (vg)?

Volume group is consists of pv's.

What is logical volume (lv)?

Logical volume is to manage the storage where admins increase the storage if it run out of space of reduce the space if they don't need it.

To create lvm follow next posts. Thank you!