LVM tips

Add a new harddisk
/dev/sdb
Create partition
Sudo fdisk /dev/sdb
Command (m for help): m
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)

Command (m for help): p

Disk /dev/sdb: 107.4 GB, 107374182400 bytes
43 heads, 44 sectors/track, 110843 cylinders, total 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xab3ad034

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   209715199   104856576   8e  Linux LVM

Install lvm package
Sudo apt-get -y install lvm2

Create PV
pvcreate  /dev/sdb1  -ff

Create VG
vgcreate openstack-vg /dev/sdb1

Create LV
lvcreate -L60G -nlv-images openstack-vg

Check and verify
Vgs
Pvdisplay
Lvdisplay

Format to expected file system
 mkfs.ext3 /dev/openstack-vg/lv-images

Mount LV
mount   /dev/openstack-vg/lv-images os-images/