Hello, I am not sure if this is the right list to put this, but I was just looking over the documentation for the Service Spec file: https://docs.ceph.com/en/octopus/cephadm/drivegroups/ and under one of the "Advanced Cases" example, I believe there *might* be an error? Here is the example (for 20 HDDs, 12 SSDs, 2 NVMEs): --- START --- service_type: osd service_id: osd_spec_hdd placement: host_pattern: '*' data_devices: rotational: 0 db_devices: model: MC-55-44-XZ limit: 2 (db_slots is actually to be favoured here, but it's not implemented yet) --- service_type: osd service_id: osd_spec_ssd placement: host_pattern: '*' data_devices: model: MC-55-44-XZ db_devices: vendor: VendorC --- END --- For the 'data_devices' under the 'osd_spec_hdd' layout, should 'rotational' not be '1' instead of '0'? The earlier "Simple" example (20 HDDs, 2 SSDs) has 'rotational' as '1'.