===== Install logical volumes (LVM) =====

==== Prepare and install volumes ====

Prepare a single disk or a disk raid:
  mkfs.ext3 <phsvol>
  lvm
  lvm> pvcreate <physvol>
  lvm> vgcreate <physvol> // or several physical volumes: <physvol1> <physvol2> <physvol3>
  lvm> lvcreate <volgroup> <physical>
  lvm> quit
  mkfs.ext3 /dev/mapper/<volgroup-logvol>
  mount /dev/mapper/<volgroup-logvol> <dir>

Auto-mount during boot:
  vim /etc/fstab
  /dev/mapper/<volgroup-logvol> <dir> ext3 noatime,user_xattr 0 0

==== 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 ====

  - lvm > pvcreate /dev/sde1 > pvcreate /dev/md2
  - lvm > vgcreate vg_backup /dev/sde1 > vgcreate vg_data /dev/md2
  - lvm > vgdisplay vg_backup to check ### of free extents (following steps same for vg_data, but 2 logical volumes)
  - lvm > lvcreate -l### vg_backup (do not use -LxxGB, use size with -l### which is number of extents)
  - lvm > lvrename vg_backup lvol0 lv_backup
  - lvm > vgcfgbackup to backup volume group configurations
  - lvm > exit
  - umount /home > umount /srv
  - mkfs -t ext3 /dev/vg_backup/lv_backup > mkfs -t ext3 /dev/vg_data/lv_home > mkfs -t ext3 /dev/vg_data/lv_srv
  - mkdir /backup
  - mount /dev/vg_backup/lv_backup /backup > mount /dev/vg_data/lv_home /home > mount /dev/vg_data/lv_srv /srv

  * As I use this machine as a server I did not consider to upgrade Edgy to Feisty, but I would expect that this can be done without problems. I'm not sure this is the best way or the fastest, but it worked for me.

==== Check wether all volumes get mounted during system boot ====

For whatever reason, my swap volume which resides on raid1 was not mounted during system boot. After some searching I found that the uuid where not matching between /dev/disk/by-uuid and /etc/fstab.

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 (md0, md1) to the respective entry in fstab.

==== Copy content of entire partition ====
  rsync -avH /backup /mnt/new_backup/