LVM TUTORIAL BASICS V 1.0 03/21/07
by derrick caluag
[root@intel-4 ~]# fdisk -l
Disk /dev/sda: 145.4 GB, 145492017152 bytes
255 heads, 63 sectors/track, 17688 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 16 128488+ 83 Linux
/dev/sda2 17 1060 8385930 83 Linux
/dev/sda3 1061 1321 2096482+ 82 Linux swap
/dev/sda4 1322 17688 131467927+ 8e Linux LVM
INITIALIZATION
-- Create Physical Volume
pvcreate /dev/sda4
-- Create Volume Group
vgcreate VolG00 /dev/sda4
-- Create Logical Group (this will create 21G for LVhome)
lvcreate -L21000 VolG00 -n LVhome
-- Format the create Group with desired file system
mkfs.ext3 -b 4096 /dev/VolG00 / LVhome
-- Create Mount point on fstab
vi /etc/fstab
/dev/VolG00/LVhome /home ext3 defaults 1 2
-- Backup files on mountpoint
tar –zcvf /tmp/home.tgz /home
mv /home home2
mkdir home
-- Mount the partition
mount /dev/VolG00/LVhome
-- Untar the backup file back to the mount point
cd /home
cp /tmp/home.tgz
tar –zxvf home.tgz
EXTENDING LVM
-- Unmount partition
umount /dev/VolG00/LVhome
Extend
lvextend -L+1G /dev/VolG00/LVhome
add 1G to current size
or
lvextend -L12G /dev/VolG00/LVhome
extend size to 12G
-- Check extended
e2fsck -f /dev/VolG00/LVhome
-- Resize the
resize2fs /dev/VolG00/LVhome
-- Remount the partition
mount /dev/VolG00/LVhome
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