Install
apt-get install lvm2
Snapshot
lvcreate -L592M -s -n dbbackup /dev/ops/databases
Make dir and mount it
mkdir /mnt/ops/dbbackup mount /dev/ops/dbbackup /mnt/ops/dbbackup
Backup it
tar -cf /dev/rmt0 /mnt/ops/dbbackup
Remove snapshot
umount /mnt/ops/dbbackup lvremove /dev/ops/dbbackup
Create physical volume on partition
pvcreate /dev/hdb1
Create volume group
vgcreate vg00 /dev/hda1 /dev/hdb1
Test if worked?
vgdisplay vg00
Create logical volume
lvcreate -L10G -nlv00 vg00
Test it
lvscan -v
Create partition
mkfs.ext3 /dev/vg00/lv00
Add another drive/partition initialized with pvcreate /dev/hda7
vgextend vg00 /dev/hda7
Extend volume
lvextend -L +5G /dev/vg00/lv01
Creating ec2 snapshots
dmsetup ls dmsetup suspend vg00-data
Run create snapshot
dmsetup resume vg00-data