This is also something I just did in the last days, converting volumes to an EC pool, which works well. But I had to add a nova section in the ceph.conf to allow retype of "in-use" volumes [0]. [0] https://bugs.launchpad.net/cinder/+bug/1941062 Zitat von Tony Liu <tonyliu0592@hotmail.com>:

Hi,

With Antelope, old volume type is on replicated pool and new volume type is on EC pool. Change volume type doesn't work, volume type remains and no error returns. Is such change supported?

I also tried change volume type from one replicated pool to another replicated pool. Doesn't work either.

Am I missing anything?

Thanks! Tony