[ceph-users] consistency of import-diff

Hello, does anybody know whether there is any mechanism to make sure an image looks like the original after an import-diff? While doing ceph backups on another ceph cluster i currently do a fresh import every 7 days. So i'm sure if something went wrong with import-diff i have a fresh one every 7 days. Otherwise i waste a lot of backup storage. So i wanted to know if there is any way to be sure that the image is OK and save and match the orignal snapshot afterwards. Greets, Stefan