Hi, Here's the original "bug" filed against Nova: https://bugs.launchpad.net/nova/+bug/1266262 There has been a lot of traffic on the mailing lists in the past and review churns on this topic: http://bit.ly/ext4-ephemeral Based on the last thread, there are 2 reviews in progress: https://review.openstack.org/#/q/status:open+project:openstack/nova+branch:master+topic:bug/1266262,n,z And the Nova core team suggested adding a blueprint (in the last Nova meeting) https://blueprints.launchpad.net/nova/+spec/ext4-as-ephemeral-disk Please take a look to see if the changes in progress will work in your environment(s) and let us know thanks, dims -- Davanum Srinivas :: https://twitter.com/dims