I read a doc on this the other day, but for the life of me I can't remember where. It's relevant to this review: https://review.openstack.org/#/c/97612/18/nova/virt/vmwareapi/volumeops.py If anybody knowledgeable could give this a glance I'd be grateful. I'd like to know I'm not giving duff advice. Thanks, Matt -- Matthew Booth Red Hat Engineering, Virtualisation Team Phone: +442070094448 (UK) GPG ID: D33C3490 GPG FPR: 3733 612D 2D05 5458 8A8A 1600 3441 EA19 D33C 3490