Hi All, I've been using ceph block and object storage for years but just wandering into cephfs now (Nautilus all servers on 14.2.9 ). I created small data and metadata pools, a new filesystem and used: ceph fs authorize <fsname> client.<name> / rw creating two new users to mount it, both can one using fuse (14.2.9) and one using kernel client (Ubuntu 20.04 kernel 5.4.0-53). so far so good, but then it gets "weird" I can perform metadata operations like "mkdir" and "touch" but not actually write any data: testy-mctestface% touch /mnt/cephfs/boo testy-mctestface% echo foo > /mnt/cephfs/boo echo: write error: operation not permitted auth caps look good to me, but seem most likely to be worng: root@ceph-mon0:/ # ceph auth get client.client0 exported keyring for client.client0 [client.client0] key = <SEKRET> caps mds = "allow rw" caps mon = "allow r" caps osd = "allow rw tag cephfs data=<fsname>" is "data" hear supposed to be <fsname> or <data_pool_name>? Presumably it's fsname since that what the "fa authorize" put there and it should know... can anyone see what I'm doing wrong here? Thanks, -Jon