LVM info - OTHER than HOWTO's

[Richard Owlett]

In some of my reading I came across a page recommending LVM for 
ease of adjusting space.

When searching for more information all I'm finding are 
essentially HOWTO's with only a couple of paragraphs on "Whats" 
and "Whys". Essentially nothing on "Why not".

No information on dual boot.

Suggestions?