cloud-initramfs-rescuevol - 0.18.debian8pureos1 main

This package adds functionality to an initramfs built by initramfs-tools.
When installed the initramfs will check to see if any partitions
with a label of 'RESCUE_VOL' are attached. If such a volume is attached,
it will boot off that volume rather than the root volume.
.
This is useful in a cloud environment, when the user is able to
attach and detach volumes to a running system, but has no other
mechanism for interrupting of fixing a failed boot. It is analogous
to inserting a rescue CD into a system to recover from failure.