====== lvm ======
===== LV resize =====
<sxh bash>
lvextend -L+10G /dev/system-zjrak/assets
e2fsck -f /dev/system-zjrak/assets
resize2fs /dev/system-zjrak/assets
</sxh>

==== Reduce lvm ====
  * use rescue mode and select ubuntu 14.04
  * connect and use sudo
  * find the volume group using lvscan (exemple : /dev/system-uwslj/root)
  * check the disk with <sxh bash>e2fsck -fy /dev/system-uwslj/root</sxh>
  * resize the disk to 4G (only 2G are used by default) <sxh bash>resize2fs /dev/system-uwslj/root 4G</sxh>
  * reduce the lvm volume <sxh bash>lvreduce -L 5G /dev/system-uwslj/root</sxh>
  * resize the partition with the empty space <sxh bash>resize2fs /dev/system-uwslj/root</sxh>
  * disconnect from the rescue mode and restart in normal mode

==== Add the storage to proxmox ====
  * got to "Datacenter" then "Storage"
  * add a "lvm" volume and select the group