=====
$ rbd create --size 1 img
- $ rbd snap create img@snap
+ $ rbd snap create img@snap --no-progress
$ rbd create --size 1 anotherimg
$ ceph osd pool create custom >/dev/null 2>&1
$ rbd pool init custom
$ rbd create --size 1 custom/img
- $ rbd snap create custom/img@snap
- $ rbd snap create custom/img@anothersnap
+ $ rbd snap create custom/img@snap --no-progress
+ $ rbd snap create custom/img@anothersnap --no-progress
Spell out device instead of using $DEV - sfdisk is not a joke.