http://www.howtoforge.com/linux_lvm_p2 http://tldp.org/HOWTO/LVM-HOWTO/extendlv.html
apt-get install lvm2 dmsetup mdadm reiserfsprogs xfsprogs
vgcreate fileserver /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
vgdisplay
vgscan
vgrename fileserver data
vgremove data
lvcreate --name share --size 40G fileserver
lvdisplay
lvscan
lvrename fileserver media films
lvremove /dev/fileserver/films
lvextend -L1.5G /dev/fileserver/media
lvreduce -L1G /dev/fileserver/media