Hi stackers: I think the ability about list the available volume back-ends, along with their capabilities, total capacity, available capacity is useful for admin. For example, this can help admin to select a destination for volume migration. But I can't find the cinder api about this ability. I find a BP about this ability: https://blueprints.launchpad.net/cinder/+spec/list-backends-and-capabilities But the BP is not approved. Who can tell me the reason? Thanks. ---------- zhangleiqiang (Trump) Best Regards