Ceph: setup Rados Block Devices (RBD) nodes on Debian
In addition of object storage, Ceph is able to provide block devices. Ceph’s RADOS Block Device (RBD) provides access to block device images that are striped and replicated across the entire storage cluster.
For example this is used to store Virtual Machines on OpenStack. With that solution, you’ve got a real fault tolerance system for your VM and distributed.
The RBD part is an easy task when you’ve already setup a Ceph cluster. To see what you can do with, follow the link.