Hello, I have made some tests with creating OSDs and I have found out that there are big issues with the ceph-volume functionality. 1) If using dmcrypt and separate data and db block devices, ceph-volume creates cryprodevs/PVs/VGs/LVs for both devices. This might seem as normal, until one considers the possibility that a single SSD will support multiple OSDs and the whole concept of being able to resize bluestore DB partitions gets very complicated like this; I can have a full SSD encrypted, create a PV/VG on top and provide the LVs myself without an extra layer of encryption. 2) If I try to circumvent this limitation by asking ceph-volume to use already encrypted devices for both the data and the bluestore db, the OSDs are not auto scanned at startup, ceph-volume simple scan complaints that they are not real devices and nothing starts. Am I missing something?