This is definitely possible, it is called block migration. Here is an example of someone showing usage (note the bug he mentioned has been fixed): http://www.s

This is definitely possible, it is called block migration. Here is an example of someone showing usage (note the bug he mentioned has been fixed): http://www.sebastien-han.fr/blog/2012/07/12/openstack-block-migration/ http://www.sebastien-han.fr/blog/2012/07/12/openstack-block-... Note that there are some reliability issues using versions prior to qemu-1.4 and libvirt 1.0.2 To enable "true" block migration where the server remains live the whole time instead of being paused, you need to modify a config option: block_migration_flag=VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_NON_SHARED_INC,VIR_MIGRATE_LIVE (this adds VIR_MIGRATE_LIVE to the default flags) Also, keep in mind the same caveats to regular live migration with this flag in that there are edge cases where the i/o in the guest is so great that the migration will never complete.