Linux LVM

1. create LVM partition:

fdisk /dev/[disk]

change partition type from LINUX to LVM

2. initialization LVM partition:

pvcreate /dev/[disk_partiton1] /dev/[disk_partition2]

check commands:

pvs
pvdisplay

3. create LVM group:

vgcreate [group_name] /dev/[disk_partition1] /dev/[disk_partition2]

check commands:

vgs
vgdisplay

4. create logical volumes which is attached to group:

lvcreate -L[size]M -n [vol_name] [group_name]

check commands:

lvs
lvdisplay

5. format volumes:

mkfs.ext3 [LV_name_from_lvdisplay]

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EXTEND
change size volume:

lvextend -L +[size]M [LV_name_from_lvdisplay]

change size partition:

resize2fs [LV_name_from_lvdisplay]

REDUCE

fsck -f [LV_name_from_lvdisplay]

change size partition:

resize2fs [LV_name_from_lvdisplay] [size]G

change size volume:
lvreduce -L -[size]G [LV_name_from_lvdisplay]