[ceph-users] How to secure erasing a rbd image without encryption?

Dear ceph folks, I bumped into an very interesting challenge, how to secure erase a rbd image data without any encryption? The motivation is to ensure that there is no information leak on OSDs after deleting a user specified rbd image, without the extra burden of using rbd encryption. any ideas, suggestions are highly appreciated, Samuel huxiaoyu@horebdata.cn