Resize existing filesystem
pvs PV VG Fmt Attr PSize PFree /dev/sda3 rose lvm2 a- 144.85G 44.85G lvm lvm> lvs LV VG Attr LSize Origin Snap% Move Log Copy% home rose -wi-ao 50.00G opt rose -wi-ao 10.00G root rose -wi-ao 10.00G tmp rose -wi-ao 10.00G var rose -wi-ao 20.00G lvm> lvresize -L +30G /dev/rose/home /dev/sda3 Extending logical volume home to 80.00 GB Logical volume home successfully resized lvm> quit Exiting. resize_reiserfs -s +30G /dev/rose/home df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/rose-home 80G 49G 32G 61% /home
using LVM on Live CD
here is a great howto getting LVM working.
what I did here was
aptitude install lvm2 dmsetup modprobe dm-mod pvscan vgscan vgchange -a y
and all the lvm's are active and mountable