====== LVM2 ======


===== FDISK =====
if you are not doing a raid:
  create partition with type 8e


===== Create a volume group =====
  vgscan
  vgchange -a y
  pvcreate /dev/md1
  vgcreate vx /dev/md1


===== Unmount a volume group =====
  vgchange -a n vx


===== Display volume group =====
  vgdisplay vx


===== Display Logical Volume =====
  lvdisplay /dev/vx/samba


===== Create new virtual =====
  lvcreate -L20G  -nusr            vx
  lvcreate -L10G  -nvar            vx
  lvcreate -L5G   -nopt            vx
  lvcreate -L20G  -nhome           vx
  lvcreate -L5G   -ntmp            vx
  lvcreate -L10G  -nwww            vx
  lvcreate -L20G  -nmail           vx
  lvcreate -L5G   -nportage        vx
  lvcreate -L10G  -ndistfiles      vx
  lvcreate -L20G  -ndistfilescache vx
  lvcreate -L50G  -nsamba          vx
  lvcreate -L10G  -nsrc            vx
  lvcreate -L50G  -nbackup         vx
  lvcreate -L50G  -ntrash          vx
  lvcreate -L100G -nvmware         vx
  lvcreate -L300G -nvideo          vx
  lvcreate -L50G  -ntorrent        vx


mkfs.ext4 /dev/vx/trash



===== Rename virtual =====
  lvrename vx src dst

===== Resize virtual =====
  lvextend -L +xxG /dev/vx/samba
  resize_reiserfs -f /dev/vx/samba


===== Resize virtual - ext4 =====
  umount /dev/vg/somename
  e2fsck -f /dev/vg/somename
  resize2fs /dev/vg/somename 29G  (Just less than the actual size)
  e2fsck -f /dev/vg/somename
  lvextend -L +50G /dev/vg/somename  
  resize2fs /dev/vg/somename
  fsck -n /dev/vg/somename
  e2fsck -f /dev/vg/somename

===== Ext3 Resize =====
  umount /dev/vx/home
  "not needed now" tune2fs -O ^has_journal /dev/vx/home
  e2fsck -f /dev/vx/home
  resize2fs /dev/vx/home 49G
  lvresize -L 50G /dev/vx/home
  resize2fs /dev/vx/home
  fsck -n /dev/vx/home
  "not needed now" tune2fs -j /dev/vx/home

===== Remove a virtual =====
  lvremove /dev/vx/samba

===== Force a cache rebuild if not all of the vg groups appear =====
 pvscan --cache