lvm__chroot

# : Lets mount everything inside the new rootvol
# mount /dev/rootvg/varvol /mnt/new/root/var
# mount /dev/sda1 /mnt/new/root/boot
# mount -o bind /dev /mnt/new/root/dev
# mount -t sysfs sys /mnt/new/root/sys
# mount -t procfs none /mnt/new/root/proc

# : Chrooting now..
# chroot /mnt/new/root

# : inspect if lvm & btrfs is present in intramfs
# lsinitrd /boot/initramfs-3.14.* | grep -e ^lvm -e ^btrfs
# 

# : There’s none of those modules so we will add em...
# vi /etc/dracut.conf
    ...
    # dracut modules to add to the default
    add_dracutmodules+="lvm btrfs”
    ...
  :wq!

# : Regenerating initramfs for my kernel v3.14.3-200
# cd /boot && dracut --force initramfs-3.14.3-200.fc20.x86_64.img vmlinuz-3.14.3-200.fc20.x86_64
# lsinitrd /boot/initramfs-3.14.3-200.fc20.x86_64.img | grep -e ^btrfs -e ^lvm
btrfs
lvm

# : Update grub
# grub2-install /dev/sda
# grub2-mkconfig -o /boot/grub2/grub.cfg

# sync ; sync ; exit