LVM-Part I

This post and coming few posts will be dedicated to LVM and comparing various LVM commands across multiple UNIX OS flavors viz. AIX, HP-UX, Linux, Solaris ...

So lets start...Here's what does the abbreviation "LVM" stand for and what exactly is LVM?

LVM-Logical Volume Manager

Logical Volume Manager allows administrators to allocate storage to applications and users, in a flexible way.

The main elements of an LVM system are:
1. Volume Group(VG)
2. Physical Volume(PV)
3. Logical Volume(LV)
4. Physical Extent(PE)
5. Logical Extent(LE)

Here is how these elements fit in a system:


As per above diagram, here is how the actual system would look like(an example)
Click on the picture below, to have a closer n clearer look :)