Comment 2 for bug 1490765

Ryan, all ephemeral disks are purged upon instance delete, whether encrypted or not. My thought earlier was that if the purge process left any trace of data (which I have since learned is extremely unlikely), then the use of an encrypted ephemeral disk would have provided additional security if the key was deleted upon the purge. Given the suitable purge process, I don't think this bug is important now, so I think we should close it. Thanks for checking on this.