How to mount LVM partitions from rescue mode (Fedora/CentOS/RedHat)

Boot your rescue media.
Scan for volume groups:

# lvm vgscan -v

Activate all volume groups:

# lvm vgchange -a y

List logical volumes:

# lvm lvs –all

With this information, and the volumes activated, you should be able to mount the volumes:

# mount /dev/volumegroup/logicalvolume /mountpoint