Introduction

Setup

On Linux Debian and Ubuntu

We will assume that you create the LVM on a RAID partition called md1. Adapt this to your situation.

Also replace pinkflower by a relevant name identifying your volume group.

Create the physical volume

pvcreate /dev/md1

Create the virtual group

vgcreate pinkflower /dev/md1

Create the logical volumes

Here we are going to create an LV for swap. 10G gives the size of the volume (10 Gb). Adapt it to your needs

lvcreate -L 10G -n root pinkflower

If you want to create other volume, check the space left on the group with the following command:

vgs

To add another volume redo the lvcreate step.

Create the file system

mkfs.ext4 /dev/pinkflower/root

Check the filesystem

lvs  

Outdated

Resize existing file system without LiveCD

pvs
  PV         VG   Fmt  Attr PSize   PFree
  /dev/sda3  rose lvm2 a-   144.85G 44.85G

lvm

lvm> lvs
  LV   VG   Attr   LSize  Origin Snap%  Move Log Copy%
  home rose -wi-ao 50.00G
  opt  rose -wi-ao 10.00G
  root rose -wi-ao 10.00G
  tmp  rose -wi-ao 10.00G
  var  rose -wi-ao 20.00G
lvm> lvresize -L +30G /dev/rose/home
  Extending logical volume home to 80.00 GB
  Logical volume home successfully resized
lvm> quit
  Exiting.

resize_reiserfs -s +30G /dev/rose/home

df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/rose-home  80G   49G   32G  61% /home

Using LVM on Live CD

here is a great howto getting LVM working.

what I did here was

aptitude install lvm2 dmsetup
modprobe dm-mod
pvscan
vgscan
vgchange -a y

and all the lvm's are active and mountable

LVM on RAID

A great howto is here http://www.gagme.com/greg/linux/raid-lvm.php