LVM

http://tldp.org/HOWTO/LVM-HOWTO

workflow

umount /dev/myvg/homevol
lvextend -L+1G /dev/myvg/homevol
e2fsck -f /dev/vg/h2g2
resize2fs /dev/myvg/homevol
mount /dev/myvg/homevol /home

reiserfs extend/resize

resize_reiserfs -f /dev/myvg/homevol

lvm extend/resize

vgchange -a y my_volume_group
lvextend -L+1G /dev/myvg/homevol