Hi, what is the purpose of the db_slots attribute in a DriveGroup specification? My interpretation of the documentation is that I can define how many OSDs use one db device. https://docs.ceph.com/en/reef/cephadm/services/osd/#additional-options "db_slots - How many OSDs per DB device" The default for the cephadm orchestrator is to create as many DB volumes on a DB device as needed for the number of OSDs. In a scenario where there are empty slots for HDDs and an existing DB device should not be used fully "db_slots" could be used. But even if db_slots is in an OSD service spec the orchestrator will only create as many DB volumes as there are HDDs currently available. There is a discussion from 2021 where the use of "block_db_size" and "limit" is suggested: https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/6EVOYOHS3BTT... Shouldn't db_slots make that easier? Is this a bug in the orchestrator? Regards -- Robert Sander Heinlein Consulting GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-43 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 220009 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin