User:Nathanlkoch/Tutorials/Btrfs Bootable Backups with Snapshots and Grub
Bootable Btrfs Snapshots
You can create snapshots of your partition sub volumes which you can recover from later or create chronological backups for safe keeping.
To boot from them. You will need grub-btrfs.
emerge -av app-eselect/eselect-repository
eselect repository enable guru
emerge --ask --verbose grub-btrfs
Now whenever you updated grub with a
grub-mkconfig -o /boot/grub/grub.cfg
It will detect your bootable sub volumes. You can also set it to detect them automatically and add them.
The config file for grub-btrfs is located at "/etc/default/grub-btrfs/config".