Logical Volume Management is used to treat seperate disks as one. However, this can cause trouble when trying to access the disks from a recovery CD, etc.
To mount lvm partitions from a livecd (for purposes of recovery/emergency maintenance), simply:
modprobe dm-modto load required modules
lvm vgchange -ayto become aware of the volume groups
- mount as normal with
mount /dev/vg_(machine-name)/(distro-name) /location/to/mount/to.
Expand a volume
In order to expand a logical volume and its corresponding filesystem:
- umount /dev/vg_machine/lv
- lvresize -L +2G /dev/vg_machine/lv
- e2fsck -f /dev/vg_machine/lv
- resize2fs /dev/vg_machine/lv