In addition to uberNUT69's suggestions, everything you want to know is answered in the LVM HowTo FAQs:
http://www.ibiblio.org/pub/Linux/doc...O.html#lvm2faq
4.1. LVM 2 FAQ:
- 4.1.1. I have LVM 1 installed and running on my system. How do I start using LVM 2?
- 4.1.2. Do I need a special lvm2 kernel module?
- 4.1.5. Does LVM 2 use a different format from LVM 1 for it's ondisk representation of Volume Groups and Logical Volumes?