===== Logical Volume Manager (LVM) =====

==== Desired configuration of the disks ====

^ hdd ^ partition ^ raid1 ^  lvm           ^ mount point ^
| sda |  sda1     |  -    |  -             | /            |
| sda |  sda2     |  -    |  -             | swap         |
| sda |  sda3     |  -    |  vg1           | /srv         |
| sdb |  sdb1     |  -    |  vg1           | /srv         |


==== Install Base ====

  - Install Kubuntu Feisty (7.04) Alternate Install: F6-F6-Expert Mode
  - Install LVM during initial setup
  - Boot into KDE from HD

==== Install LVM manually ====

If you need to install LVM after having setup the base system, note that there is a bug in Edgy and Feisty where the executable files will not be found. To fix it, execute the 2nd instruction below:

  apt-get install lvm2
  ln -s /lib/lvm-200 /lib/lvm-0

==== Install LVM volumes ====

If something goes wrong during initial install or if you later need to modify / check the lvm installation, here are the relevant commands. Before setting up the lvm volumes, you might want to check the partition table (see next paragraph).
  - lvm > pvcreate /dev/sda3
  - lvm > pvcreate /dev/sdb1
  - lvm > vgcreate vg_data /dev/sda3
  - lvm > vgextend vg_data /dev/sdb1
  - lvm > vgdisplay vg_data  ## check volume group, count of free extents
  - lvm > lvcreate -lxxx vg_data  ## -lxxx is number of extents
  - lvm > lvcreate vg_data
  - lvm > lvrename vg_data lvol0 lv_data
  - lvm > lvdisplay vg_data  # check logical volume(s)
  - lvm > vgcfgbackup to backup volume group configurations
  - lvm > exit
  - umount /srv
  - mkfs -t ext3 /dev/vg_data/lv_data
  - mkdir /srv
  - mount /dev/vg_data/lv_data /srv

==== Check volume integrity and mount points ====

to check wether the partition table is ok:
  sfdisk -l

to check wether root and swap are mounted, enter:
  mount
  free -m -t

to check mismatching uuid's, enter:
  ls -la /dev/disk/by-uuid
  cat /etc/fstab

to fix, do:
  vim /etc/fstab
replace the uuid's found in fstab with the ones found in /dev/disk. Make sure you copy the correct uuid (/, swap) to the respective entry in fstab.